Birding for Tyrant Flycatchers of the Genus Tyrannus

Posted by Chris Cunningham
Scissor-tailed Flycatcher at Pelican Island, Texas
The Most Spectacular Member of the Tyrannus Clan: Scissor-tailed Flycatcher (T. forticatus) on Pelican Island, Texas. Exceptional in coloration and plumage, the Scissor-tailed Flycatcher is a stand-out among the relatively conservative-looking members of its genus. Scissor-tails prefer open, grassy environments with small clumps of trees from which to hunt. They also love to perch and hunt along barbed-wire fence lines and are a common sight in summer on the plains of the southern U.S. Canon EOS 7D/600mm f/4L IS (+1.4x TC). High-speed synchronized fill-flash.

The family Tyrannidae (Tyrant Flycatchers) is primarily a South American group. Of over 370 species, only 35 have ranges that extend far enough north to reach the United States. Eight genera of tyrant flycatchers occur in North America, north of Mexico. Considered by evolutionary biologists to be among the most primitive of songbirds, tyrannids are nevertheless highly successful, ranging from Patagonia, and even the Falkland and Galápagos Islands, to Canada. These birds occur across a wide variety of habitats, from bottomland forests to the high Andes.

Due to their bold personalities and active hunting behaviors, the Tyrant Flycatchers of the genus Tyrannus (kingbirds and kin) are some of the most exciting birds to watch. Exhibiting a rather limited palette of colors relative to some other songbirds, ranging primarily from browns and olives to gray on top (plus orange or red semi-concealed crown stripes for display), and a variety of shades of yellow below, species of Tyrannus may never be as popular as warblers with birders. But what they lack (usually) in terms of showy colors they make up for in personality and behavior.

Couch's Kingbird at Estero Llano Grande State Park, Texas
Couch’s Kingbird (Tyrannus couchii) on Cable at Estero Llano Grande State Park, Rio Grande Valley, Texas. This young bird showed no fear of me whatsoever, despite a close approach. Canon EOS 7D/600mm f/4L IS (+1/4x TC). High-speed synchronized fill-flash.

Other than the Great Kiskadee, perhaps, Kingbirds are the most conspicuous of the North American flycatchers. These large, aggressive birds will not tolerate being pushed around by other, larger birds like crows or even raptors. Although they will eat fruit and seeds during certain times of the year (depending on the Kingbird species), insects form an integral part of their diets.

From a perch, they will hawk large insects from the air above water or ground and also grab prey from the ground. The fact that they return again and again to a perch can make photography relatively easy and enjoyable. After locating an avian photographic subject, I often snap few frames, advance a few paces, snap a few frames, advance a few paces, and so on. Some bird species will flush as soon as they see a human. Others will hesitate until a particular distance is breeched (minimum approach distance). Tyrant flycatchers, too, eventually flee hesitantly into the air upon a close enough approach, but I can’t help feeling as though these bird are asking themselves: Do I really have to leave? Can I take this guy?

Cassin's Kingbird at Cave Creek Ranch, Arizona.
Cassin’s Kingbird (Tyrannus vociferans) on Mesquite at Cave Creek Ranch, Arizona. This bird flashed a bright orange (on top) and red (below) crown-stripe upon takeoff and could easily be confused for a Western Kingbird. Considering a number of other images together, however, the identification was based upon absence of bold white outer tail feather margins, lighter brownish wings with pale feather edges, and a crescent-shaped white patch or “mustache” below eye. In such similar species, though, there is room for uncertainty. Canon EOS 7D/600mm f/4L IS (+1.4x TC). High-speed synchronized fill-flash.

Although not as difficult to tell apart as some Empidonax Flycatchers, which are literally indistinguishable based on appearance alone, some species of Tyrannus are quite tricky to identify. Even based on a reasonably good photograph, experienced birders may disagree about the identity of a specific individual. Cassin’s and Western Kingbirds, for example, overlap in range in the West and are often confused. Likewise Couch’s, Tropical, and Western Kingbirds have overlapping ranges in the Lower Rio Grade Valley.

All these species, though, do have distinctive field marks and can in principle be distinguished. However, depending on the light and angle of view, colors can change. Vegetation can obscure minor or subtle features. In these troublesome cases, after exhausting reasonable avenues of identification, I try to live with the uncertainty–rather than decide which member of this sometimes look-a-like group I’ve spotted.

Eastern Kingbird on Hackberry at Anahuac National Wildlife Refuge, Texas
Eastern Kingbird (Tyrannus tyrannus) on Hackberry at the Skillern Tract, Anahuac National Wildlife Refuge, Texas. Kingbirds, like many other insectivorous birds, often hang around Hackberry trees. Canon EOS 7D/100-400mm f/4.5-5.6L IS. Hand-held, natural light.

The quest for certainty blocks the search for meaning. Uncertainty is the very condition to impel man to unfold his powers.—Erich Fromm

 ©2014 Christopher R. Cunningham. All rights reserved. No text or images may be duplicated or distributed without permission.

Birding the Texas Summer Swelter: More Wader Fishing Behavior

Posted by Chris Cunningham
Great Blue Heron with Bluegill in Spawning Colors at 40-Acre Lake, Brazos Bend State Park, Texas
Great Blue Heron with Bluegill in Spawning Colors at 40-Acre Lake, Brazos Bend State Park, Texas. This bird was the ruler of a string of small marshy “islands” in the northeast corner of the lake. Canon EOS 7D/600mm f/4L IS (+1.4x TC). High-speed synchronized fill-flash.

Waders are an endless source of birding pleasure for me. Their hunting and fishing strategies are highly varied, and I’m always on the lookout for techniques I’ve not seen before. This summer I spotted a number of interesting new things at Brazos Bend SP.

40-Acre Lake was a hot-bed of wader fishing behavior this summer. A Great Blue Heron with a slightly injured left wing (above) claimed the northeast corner of the lake for itself, frequently driving away lesser birds—like Little Blues, Tri-colored Herons, and Yellow-crowned Night Herons. The Great Blue, however, adhered to an uneasy peace with a Great Egret (shown below) that spent most of its time on the small islands a bit to the south. When they came face to face, they seemed to agree that the balance of powers was such that a fight would be fruitless.

For long stretches of time over a number of days, I observed the same Great Blue hunt and fish rather unsuccessfully—a bug here and there, a few muddled struggles with some snake-like sticks, but no amphibians or big fish. One morning, however, the bird swooped down from a tree top and stabbed the big bluegill in the above photo. The bird spotted the fish from at least 100 yards away, flew over, and speared the fish with a single thrust. No fuss, no muss. In a matter of minutes the fish was manipulated into swallowing position and ingested.

On another occasion, I saw the Great Blue place an insect on the surface of the water and stare at it for a few seconds. A gentle current carried the insect away from the heron. The bird suddenly snapped up and ate the bug before it got too far away. Was this bait-fishing of the type occasionally exhibited by Green Herons? Hard to say, but it’s something new to watch for.

Fishing Great Egret at 40-Acre Lake, Brazos Bend State Park, Texas.
Fishing Great Egret at 40-Acre Lake, Brazos Bend State Park, Texas. This bird ruled a steamy archipelago kingdom slightly to the south of the one ruled by the Great Blue. Canon EOS 7D/600mm f/4L IS (+1.4x TC). High-speed synchronized fill-flash.

One morning I turned my attention from the Great Blue to the Great Egret. It had its head down, and held it there. It took me a moment to realize that the bird was engaged in a type of fishing often utilized by Black-Crowned Night-Herons. The stationary bird opened and closed its beak repeatedly while keeping it in the water, perhaps hoping the gentle rythmic disturbance would attract a fish.

One might surmise that after observing waders regularly in a single park over a few years’ time, the surprises and new observations would cease. This is certainly not the case at Brazos Bend, where nearly every visit opens a new window into avian life.

Novelty has charms that our mind can hardly withstand.–William Makepeace Thackeray

©2014 Christopher R. Cunningham. All rights reserved. No text or images may be duplicated or distributed without permission.

Road Trip! Desert Southwest Birding in Summer (Part 3: Cave Creek Canyon)

Posted by Two Shutterbirds
Acorn Woodpecker Feeding Young at Cave Creek Ranch, Arizona
Acorn Woodpecker Feeding Youngster at Cave Creek Ranch, Portal, Arizona. Canon EOS 7D/600mm f/4L IS (+1.4x TC). High-speed synchronized fill-flash.

Visiting Cave Creek Ranch in Portal, Arizona, and environs in Cave Creek Canyon for a few days each year has become a Two Shutterbirds birding tradition. We arrive each time hoping to discover or photograph something new or obtain better shots of species we have photographed before. Usually we do see or document things new to us. This July’s visit was no exception.

White-breasted Nuthatch at Cave Creek Ranch, southeast Arizona
White-breasted Nuthatch with Sunflower Seed at Cave Creek Ranch, southeast Arizona. To get this shot, I filled a small cavity with seed in the exposed roots of a tree just outside our cabin. It was less than an hour before a jar of nuthatches found the cache. I happily sat still as they flew in, hopped down the trunk, and grabbed a sunflower seed before posing briefly for a picture! Canon EOS 7D/500mm f/4L IS (+1.4x TC). Natural light.

At Cave Creek, we spend days exploring places like Barfoot Park, South Fork, and the Vista trail—trying to include a mix of new and familiar locales. Because the terrain can often be steep, these are typically pure birding trips (binoculars or, at most, small glass only). This July, Hermit Thrushes, Western Wood-Pewees, and Sulphur-bellied Flycatchers were the most commonly encountered birds at lower elevations, and Yellow-eyed Juncos predominated at higher ones. In the evenings, once we were beat, and upon return to the ranch, we sometimes spent a few hours hanging around shooting the numerous birds that visit the seed and nectar feeders.

Blue-throated Hummingbird at Cave Creek Ranch, Arizona.
Blue-throated Hummingbird at Cave Creek Ranch, Portal, Arizona. These are the largest hummingbirds you’re likely to see at Cave Creek, or anywhere in North America—unless you’re lucky enough to see a Magnificent or Plain-capped Starthroat! Canon EOS 7D/600mm f/4L IS (+1.4x TC). High-speed synchronized fill-flash.

Seed feeders at Cave Creek Ranch attract large numbers of House Finches, Lesser Goldfinches, Mexican Jays, and Acorn Woodpeckers. Occasionally a White-Breasted Nuthatch, Ladder-backed Woodpecker, Arizona Cardinal, Hepatic or Summer Tanager, or Curve-billed Thrasher showed up as we watched. In the thickets along the road behind the office we saw Cassin’s Kingbirds, Black Phoebes, and Canyon and Bewick’s Wrens. At the nectar feeders, Black-chinned and Broad-billed Hummingbirds predominated. We saw a few Blue-throated and a single Anna’s Hummingbird. Another birder saw a single Violet-crowned Hummingbird, but Chris was looking the other way. A lifer missed by a fraction of a second! A Plain-capped Starthroat was reported in the area (we saw one a few days earlier in Madera Canyon). Without exaggeration, Cave Creek Canyon is a magical place, and place not to be missed by anyone interested in birds or nature.

Cave Creek Canyon at Dusk
South Wall of the Entrance to Cave Creek Canyon at Dusk. The mouth of the canyon opens into the Chihuahuan Desert. Canon 7D/Tokina 11-16mm. Natural light.

Tradition is a guide and not a jailer.—W. Somerset Maugham

©2014 Christopher R. Cunningham and Elisa D. Lewis. All rights reserved. No text or images may be duplicated or distributed without permission.

The Most Spectacular Northern Cardinal Subspecies?

Posted by Chris Cunningham
Male Arizona Cardinal at Cave Creek, Arizona
Portrait in Red: Male Arizona Cardinal at Cave Creek, Arizona. There are nineteen subspecies of Northern Cardinal in North and Central America. The “Arizona Cardinal,” Cardinalis cardinals superbus, may be the most spectacular cardinal in the U.S. Canon EOS 7D/600mm f/4L IS (+1.4x TC). High-speed synchronized fill-flash. All images in this post were saturated 3%.

During our recent road trip to southeast Arizona we once again encountered Cardinalis cardinals superbus, a bird sometimes referred to as the “Arizona Cardinal.” I paused for a closer look and made a few comparisons with our own Cardinalis cardinals magnirostris, the Northern Cardinal subspecies that occurs throughout the eastern third of Texas.

Male Northern Cardinal at Brazos Bend State Park, Texas
East Texas Bird: Male Northern Cardinal (C. c. magnirostris) at Pilant Lake, Brazos Bend State Park, Texas. Canon EOS 7D/500mm f/4L IS (+1.4x TC). Natural light.

The Arizona race of cardinals occurs in southern California, Arizona, New Mexico and northern Mexico and is generally larger, taller-crested, longer-tailed, and more brightly colored (less gray on the back) than Texas Gulf Coast cardinals, or any of the other races of cardinals in the U.S. The Arizona Cardinal’s face mask also tends toward lighter shades and is smaller, often not meeting across the top of the bill. In general behavior, the Arizona subspecies was indistinguishable from our familiar Texas birds. Their songs, however, varied by a note or two here and there.

Female Arizona Cardinal at Cave Creek, Arizona.
Female Arizona Cardinal (C. c. superbus) on Century Plant at Cave Creek, Arizona. Canon EOS 7D/600mm f/4L IS (+1.4x TC). Natural light.

C. c. magnirostris is a beautiful bird and common bird—a bird so common that we tend to ignore it, despite its beauty. Sometimes in our travels, too, we are so taken with the new species encountered that we overlook the close relatives of familiar animals that cross our paths.

Female Northern Cardinal at the Houston Arboretum
Female Northern Cardinal (C.C. magnirostris) at the Houston Arboretum. In portrait, t’s easy to see why Northern Cardinals were referred to as “Cardinal Grosbeaks” in previous centuries. Canon EOS 7D/500mm f/4L IS (+1.4x TC). Natural light.

The Arizona Cardinal is a spectacular bird, and not easy to miss. But how many other close relatives of our less showy backyard birds are we overlooking during our far-flung birding adventures? Learning about (and keeping straight) these minor geographic variations in our native birds is yet another aspect of this incredible hobby we call birdwatching.

Why hurry over beautiful things? Why not linger and enjoy them?—Clara Schumann

©2014 Christopher R. Cunningham. All rights reserved. No text or images may be duplicated or distributed without permission.

Road Trip! Birding the Desert Southwest in Summer (Part 2: Arizona-Sonora Desert Museum)

Posted by Two Shutterbirds

Poets say science takes away from the beauty of the stars – mere globs of gas atoms. I, too, can see the stars on a desert night, and feel them. But do I see less or more?—Richard P. Feynman

Male Costa's Hummingbird at the Arizona Sonoran Desert Museum
Male Costa’s Hummingbird at the Arizona-Sonora Desert Museum. Aviary bird. The Tucson area is near the eastern extremity of this hummingbird’s summer breeding range. From many angles his gorget appears blackish, but during courtship the male Costa’s is sure to direct brilliant violet rays toward potential mates! Canon EOS 7D/100-400mm f/4.5-5.6L IS. Hand-held, high-speed synchronized fill-flash.

The Arizona-Sonora Desert Museum is an interesting and highly recommended institution nestled within Saguaro National Park. Composed of zoo, botanical garden, nature park, wildlife refuge, and natural history museum, the 21-acre campus blends into the surrounding Sonoran Desert. Some animals are free to come and go as they please, and others are captive.

According to museum literature, the hummingbird aviary contains up to seven species. On the day we visited it contained only four: Anna’s, Costa’s, Black-chinned, and Broad-billed. Because Black-chinned and Broad-billed are common in the areas we bird, we focused our attention primarily on Anna’s and Costa’s.

Male Anna's Hummingbird at the Arizona-Sonora Desert Museum
Male Anna’s Hummingbird at the Arizona-Sonora Desert Museum. Aviary bird. Canon EOS 7D/300mm f/4L IS. Natural light.

The covered aviary made for a weird, muted light in which it was difficult to capture the iridescent colors of male humming bird gorgets. Because these colors are the result of the physical optics of the feathers, not pigmentation, getting the colors to show well depends on the spatial relationship between light source(s), bird, and camera. On the whole, shooting hummingbirds in the aviary was a bit unsettling: We are used to hummers being will-o’-the-wisps, and free to wander.

Verdin at the Arizona Sonoran Desert Museum
Quizzical Verdin on Desert Willow at the Arizona-Sonora Desert Museum. Wild bird. Canon EOS 7D/600mm f/4L IS (+1.4x TC). High-speed synchronized fill-flash.

We also saw a variety of wild desert birds. Cactus Wrens and White-winged Doves were the most common and were seen singing on saguaros and other plants. Verdin, Phainopepla, and Gila Woodpeckers were also about. Some Ash-throated Flycatchers and Gambel’s Quail made brief appearances.

Gila Woodpecker on Saguaro at the Arizona-Sonora Desert Museum
Gila Woodpecker on Saguaro at the Arizona-Sonora Desert Museum. Wild bird. Gila Woodpeckers nest in cavities excavated within saguaros. Many woodpeckers were raising families while we visited the Southwest, and we often saw parents bringing fruit and insects home to young. Canon EOS 7D/500mm f/4L IS (+1.4x TC). Natural light.

The Arizona-Sonora Desert Museum also boasts an impressive assortment of desert plants. A number of species were in bloom including fishhook barrel cactus, red yucca, a variety of legumes, and the spectacular red bird-of-paradise (Caesalpinia pulcherrina), a naturalized native of the Neotropics. Some saguaros were in bloom, but coming to the end of their flowering season.

Barrel Cactus flowers at the Arizona Sonoran Desert Museum
Fishhook Barrel Cactus (Ferocactus sp. ) flowers at the Arizona-Sonora Desert Museum. Canon EOS 7D/100mm f/2.8L IS macro. Hand-held, high-speed synchronized ring-flash.

Our visit to the Arizona-Sonora Desert Museum brought up many philosophical issues about the place of nature in a human-dominated landscape. We have hinted at some of these issues before, but Elisa hopes to explore them more deeply in future writings.

©2014 Christopher R. Cunningham and Elisa D. Lewis. All rights reserved. No text or images may be duplicated or distributed without permission.

Road Trip! Desert Southwest Birding in Summer (Part 1: Madera Canyon, Arizona)

Posted by Two Shutterbirds
Preening Broad-billed Hummingbird at Madera Canyon, southeast Arizona.
Preening Broad-billed Hummingbird at Madera Canyon, southeast Arizona. Canon EOS 7D/600mm f/4L IS (+1.4x TC). High-speed synchronized fill-flash.

For Upper Texas Gulf Coast birding there comes a summer tipping point where the pain outweighs the gain. By about late July, it’s tough to justify going out birding with the bugs, sweltering weather, yahoos, and low diversity of birds. What to do . . . ?

It’s time for a road trip! This time around we visited Franklin Mountains State Park (West Texas), and several places in southeast Arizona including Saguaro National Park, Arizona Sonoran Desert Museum, Cave Creek, and Madera Canyon, a classic North American birding destination in the Coronado National Forest.

Southeast Arizona lies within one of the three northward-extending prongs of tropical biodiversity that extend into the U.S., the others reaching Big Bend and the Lower Rio Grande Valley. Madera Canyon, one of the major birding hotspots within this Arizona prong, is on the northwest side of the Santa Rita Mountains, a Madrean Sky Island, about 25 miles south of Tucson.

Madera Canyon cuts largely through granitic rocks and passes through four major life zones, from Lower Sonoran in the blistering valley floor to cooler Canadian at the top, and ranges from about 3600 to over 9400 feet in elevation. At 9453 feet Mount Wrightson crowns the canyon.

Adult Painted Redstart perched on a branch
Shady Character. Painted Redstarts are common on the trails in Madera Canyon, Arizona in July. They prefer to sing, hunt, and preen under shaded cover, so it was quite a challenge to capture a usable image! Luckily, we saw this bird early on the hike, and my hand was still steady. Canon EOS 7D/300mm f4L IS. Hand-held with natural light, ISO 800, f/5.6; 1/100.

For our first visit to Madera Canyon we stayed for three days at the Santa Rita Lodge. The lodge is centrally located with hiking trails above and below in elevation. The feeders near the office were often thick with birds. Lesser Goldfinches, House Finches, White-winged Doves, and Mourning Doves predominated. Black-headed and Blue Grosbeaks, Arizona and Acorn Woodpeckers, Hepatic Tanagers, Bridled Titmice, and American Turkeys visited sporadically. Hummingbirds were abundant. Black-chinned and Broad-billeds predominated. A few Rufous and a single Plain-capped Starthroat visited while we watched. A Canyon and Bewick’s Wren appeared briefly. White-eared Hummingbirds were reported in the area, but unfortunately we didn’t see them. Mexican Jays were common around the lodge in general.

On the Nature Trail, flycatchers, especially Ash-throated and Western Wood-Pewees predominated. Elisa was lucky to see a Western Wood-Peewee nest with nestlings. Painted Redstarts were common, and we caught several possible glimpses of Flame-colored Tanagers. Just south of the lodge we were treated to a Whiskered Screech Owl roosting in a cavity in a large sycamore tree.

Hermit Thrush perched on mossy stump.
The look-out. A Hermit Thrush eyes a couple of primates walking through the woods in Madera Canyon, Arizona. Canon EOS 7D/300mm f4L IS. Hand-held with natural light, ISO 800, f/5.6; 1/160.

On the Carrie Nation Mine Trail, we  saw Ash-throated, Western Wood-Peewee, Black Phoebe, and Sulphur-bellied Flycatchers, Yellow-eyed Juncos, Hermit Thrushes, Black-throated Gray Warblers, Painted Redstarts. Elisa saw a single Red-faced Warbler.

On the last morning, we hiked the Bog Springs Trail where we saw mated pairs of Hepatic Tanagers, in one case gathering nesting materials.

Mud-puddling Two-tailed Swallowtail
Mud-puddling. This Two-tailed Swallowtail (Arizona’s state butterfly) is drinking nutrient-rich water from a mud puddle along the nature trail in Madera Canyon, Arizona. During the encounter, which lasted about 10 minutes, I observed it drink continuously and excrete excess fluid from its abdomen every 15-30 seconds. Mud-puddling allows butterflies and other insects to obtain essential mineral salts and amino acids. Canon EOS 7D/300 mm f4L IS. Hand-held in natural light, ISO 500, f/9; 1/400.

Our visit to Madera Canyon drove home one central point: There is a significant difference between birding and bird photography. In some of the places we visited, it would have required a herculean effort to haul the super telephotos up into the canyon. In those instances, we just broke out the binoculars and smaller glass and enjoyed the views or photographed flowers, insects, or reptiles.

Female Phainopepla at the Arizona Sonoran Museum.
Next time: Arizona-Sonora Desert Museum. Female Phainopepla. Canon EOS 7D/600mm f/4L IS (+1.4x TC). High-speed synchronized fill-flash.

The mountains are calling and I must go.—John Muir

@2014 Christopher R. Cunningham and Elisa D. Lewis. All rights reserved. No text or images may be duplicated or distributed without permission.

Birds and Their Prey: Identification Challenges

Posted by Chris Cunningham
Louisiana Waterthrush with fly larva at Pilant Slough, Brazos Bend State Park, Texas
Louisiana Waterthrush with Fly Larva at Pilant Slough, Brazos Bend State Park, Texas. The caterpillar-like arthropod appears to be a large horse fly larva, but I invite comments from anyone who knows better. Canon EOS 7D/500mm f/4L IS (+1.4x TC). Natural light.

Photographing birds is often not easy, and getting them in the act of hunting can be a special challenge. But even after you have the image, the work may not yet be done as prey items can be difficult to identify. Vertebrate prey items (particularly fish) can be challenging, but invertebrates, especially larval forms, can be maddening when your invertebrate biology courses were twenty-plus years ago! The rewards of such research, though, are great. Identifying prey puts you in tune with the bird’s life: Now you know what they’re looking for when you see them poking around in particular habitats, at particular times of the year. For me, this is one of the more interesting aspects of birding, one made possible by the camera.

Female Hooded Oriole with Katydid at Santa Ana National Wildlife Refuge, South Texas
Female Hooded Oriole with Katydid at Santa Ana National Wildlife Refuge, South Texas. The insect appears to be a spoon-tailed short-winged katydid (Dichopetala catinata), or related form, but I invite comments from anyone who knows better. Canon EOS 7D/600mm f/4L IS (+1.4x TC). High-speed synchronized fill-flash.

Our retinas and brains have been wired by a hundred million years of evolution to find outlines in a visually complex landscape. This helps us to recognize prey and predators.—Seth Shostak

©2014 Christopher R. Cunningham. All rights reserved. No text or images may be duplicated or distributed without permission.

New Article: American Alligator

Posted by Chris Cunningham
A Baby American Alligator on Mom's Back, Pilant Lake, Brazos Bend State Park, Texas
Baby American Alligator on Mom’s Back, Pilant Lake, Brazos Bend State Park, Texas. Canon EOS 7D/600mm f/4L IS (+1.4x TC). Natural light.

All this tromping around during hot weather has put alligators on my mind! Please check out the new article American Alligator: Training for the Tropics on the Texan Riviera.

Danger is cool.—Bryan Cranston

©2014 Christopher R. Cunningham. All rights reserved. No text or images may be duplicated or distributed without permission.

The Adaptable Cattle Egret

Posted by Chris Cunningham
Cattle Egret with Feral Hog at Pilant Slough, Brazos Bend State Park, Texas
In Deepest, Darkest Texas: Cattle Egret with feral hog at Pilant Slough, Brazos Bend State Park, Texas. True pigs have been in the New World for centuries due to human introduction. Cattle Egrets commonly follow cattle around Texas pastures, but this is the first time I have seen the birds shadowing prey-flushing pigs. All photos Canon EOS 7D/600mm f/4L IS (+1.4x TC).

Cattle Egrets are among my favorite waders. They are slightly sinister in appearance and behavior as they sneak and skulk around the margins of grasslands and marshes in search of invertebrate and small vertebrate prey. And judging by their large minimum approach distance they are among the most suspicious and distrustful of birds.

Given their dislike of people, it’s ironic that the rapid expansion of Cattle Egrets across the New World in the latter half of the 20th Century has been aided by human agriculture. Not long before the 20th Century the Cattle Egret was an Old World species. The first Cattle Egret was seen in the New World in 1877; in North America in 1941, and it began breeding in Florida in 1953. Today, Cattle Egrets are widely distributed across the Americas.

A Cattle Egret in Breeding Colors at Smith Oaks Rookery, High Island, Texas
Spectacular: A Cattle Egret in Breeding Colors at Smith Oaks Rookery, High Island, Texas. Natural light.

Although we think that the Cattle Egret reached the New World on its own, the widespread distribution of livestock here, particularly cattle, has has greatly facilitated the bird’s spread. Today, Cattle Egrets snapping up grasshoppers and other prey flushed by cattle (or farm implements!) is a common American sight.

So in the Americas, the Cattle Egret is not a human-introduced species. Yet, I find it hard to consider it precisely a native species (over much of its range) given its close association with domesticated livestock. The Cattle Egret exists exactly at the intersection of man and the rest of nature. It is one of those species well adapted to live in a human-influenced, agricultural landscape. And, as the human population increases with its ever-increasing appetite for meat and animal products, the Cattle Egret’s future looks bright indeed.

Mating Cattle Egrets at the Smith Oaks Rookery, High Island, Texas
Mating Cattle Egrets at the Smith Oaks Rookery, High Island, Texas. Cattle Egrets now breed in rookeries with native species such as Great Egrets, Roseate Spoonbills, Tricolored Herons, and Snowy Egrets. Natural light.

It is not the strongest or the most intelligent who will survive but those who can best manage change.—Charles Darwin 

©2014 Christopher R. Cunningham. All rights reserved. No text or images may be duplicated or distributed without permission.

It’s Black Skimmer Nesting Season!

Posted by Chris Cunningham
A Black Skimmer Turns an Egg, at Freeport, Texas
A Black Skimmer Turns an Egg, at Freeport, Texas. All images Canon EOS 7D/600mm f/4L IS (+1.4x TC) unless otherwise noted. Natural light.

Elisa and I recently took the opportunity to visit the Black Skimmer nesting colony at the Dow Chemical plant in Freeport, Texas during the company’s annual open house. In addition to the Black Skimmers, Gull-billed and Least Terns were present within the colony. Defense and reproduction were foremost on the birds’ minds.

Avian nesting colonies are defense mechanisms against numerous threats to eggs and chicks: Hundreds of pairs of eyes are better than one. Also, Black Skimmers are not aggressive defenders of nests as are some other colonial nesters (Common, Gull-billed and Least Terns, for example), and will nest among these species for protection. On the day we visited, Laughing Gulls loitered like juvenile delinquents on the margins of the colony hoping for a moment of inattention or distraction to grab eggs or chicks. Rats and other mammals like raccoons, can also be expected to prey on eggs and nestlings.

Gull-billed Tern over nest at Freeport, Texas
Vigilance: Gull-billed Tern Over Nest at Freeport, Texas.

Another Black Skimmer defensive tactic we observed was the “broken wing act” to distract attention from nests. In the cases I observed, I did not perceive a particular threat. Perhaps the birds were simply responding to a general level of stress due to a large number of human observers.

Black Skimmer Performing Broken Wing Act at Freeport, Texas
A Black Skimmer Performs the Broken Wing Act at Freeport, Texas. Canon EOS 7D/500mm f/4L IS (+1.4x TC). Natural light.

In addition to defensive behaviors, we observed several instances of Black Skimmers turning eggs. In marked contrast to snake and lizard eggs, almost all bird eggs must be turned often during incubation for proper development.

One of the most charming things I observed was pair feeding as part of the skimmer courtship ritual. In this ritual, the larger male Black Skimmer presents the female with a small fish. If she accepts the fish, the pair copulates. The female skimmer then eats the fish. Interestingly, terns exhibit a similar ritual—but female terns eats the fish before copulation.

On the photographic side, a persistent Tropical weather pattern continued in which moisture flowed up onto the coast from the Gulf providing high humidity and a dazzling, cloudy white sky. The unfortunate placement of the observation areas coupled with the atmosphere meant conditions for photography were poor. Because the birds were backlit, I had to wait for instances when they would turn their heads such that raking light could reveal feather detail and provide catchlights. Sometimes shooting during the Texas summer requires a little creativity.

Laughing Gull with a fish at Freeport, Texas
No Laughing Matter: Laughing Gulls with a fish at Freeport, Texas. Small groups of Laughing Gulls flanked the colony waiting for opportunities to prey on eggs and young. These two gulls couldn’t decide whether to eat or abandon (or bring back to their own young?) their nearly dried-up fish carcass. They kept dropping it and hestitantly picking it up again. Were they hoping for something better? A plump, juicy tern or skimmer chick, perhaps?

I always root for the defense.—Wellington Mara

 ©2014 Christopher R. Cunningham and Elisa D. Lewis. All rights reserved. No text or images may be duplicated or distributed without permission.

Road Trip: Birding the Rio Grande Valley in Summer

Posted by Two Shutterbirds
Buff-bellied Hummingbird at Casa Santa Ana, Rio Grande Valley, Texas
Buff-bellied Hummingbird (Amazilia yucatanensis), Casa Santa Ana, Rio Grande Valley, Texas. Four species of Amazilia hummingbirds occur in the U.S. Only the Buff-bellied is common. Canon EOS 7D/600mm f/4L IS (+1.4x TC): f/8, ISO 640; 1/1000. High-speed synchronized fill-flash.

Chris’s Field Notes: We just returned from a three-day birding adventure in the Lower Rio Grande Valley (RGV) in the vicinity of Santa Ana National Wildlife Refuge and Estero Llano Grande State Park. We stayed at Casa Santa Ana, adjacent to the wildlife refuge—highly recommended for the hospitality and birding the extensive grounds. Although the heat, humidity, and biting insects (not to mention chiggers) tested our resolve, we saw a number of new species and obtained nice (or at least better than we had!) shots of some Valley specialities, essentially Mexican species with ranges that barely extend into South Texas in summer.


Birds notable for us included: Buff-bellied Hummingbird, Groove-billed Ani, Clay-colored Robin, Northern Beardless-Tyrannulet, Altamira and Hooded Oriole, Couch’s Kingbird, Olive Sparrow, and Brown-crested Flycatcher. Nests and young birds were everywhere. I saw one adult male Black-chinned Hummingbird at Estero Llano Grande State Park (at the extreme southern extent of their summer range). Although we explored significant wetlands, including some with profuse amphibians (leopard frogs), waders were rare (strangely it seemed), compared to the Upper Texas Gulf Coast. I witnessed a display by the male Bronzed Cowbird. The bird was on a low branch overhanging a path at Santa Ana NWR when it lowered its head, roused its feathers, and flapped its wings while making whistling, buzzing, and clicking sounds. Spectacular.

The Tamaulipan mezquital ecoregion through which the Rio Grande winds is a harsh place in the summer. Scattered trees, often mesquite and “acacia” surrounded by grasses and low shrubs predominate. Shade is usually incomplete. Mosquitos were not a significant problem, but other types of biting (and bottle) flies abound. Dragonflies like Roseate Skimmer (Orthemis ferruginea) and Band-winged Dragonlet (Erythrodiplax umbrata) were profuse and offered many photographic opportunities. I didn’t see many mammals, only one Southern Plains Woodrat (Neotoma micropus). Lizards were abundant, especially the Rose-bellied Lizard (Sceloporus variabilis). White skies due to high humidity often made photography difficult. Many times I had a bead on an interesting bird only to have a dazzlingly white cloud drift in behind and ruin the shot. All in all, an amazing place, and I can’t wait to get back during cooler weather.

Groove-billed Ani at Casa Santa Ana, Rio Grande Valley, Texas.
Groove-billed Ani at Casa Santa Ana, Rio Grande Valley, Texas. That big heavy bill gives the impression of a seed-eater. Anis do eat fruit, nuts, and seeds, but the bulk of their diet consists of arthropods. Canon EOS 7D/600mm f/4L IS (+1.4x TC): f/8, ISO 800; 1/640. Natural light.
Adult Clay-colored Robin gathering nesting material photographed by E.D. Lewis
This Clay-colored Robin made several fiber-gathering trips to this back-yard garden palm tree. Canon EOS 7D/500 mm f/4L IS USM (+1.4x TC): f/5.6, ISO 500; 1/100. Natural light.

Elisa’s Field Notes: This was our first late spring/early summer visit to the Lower RGV, and I hoped that the effort (in defiance of the heat!) would yield many observations of nesting, nestlings, fledglings, etc. I was not disappointed! With excellent summer birding in our own Gulf Coast backyard, we see quite a bit of bird family life, but mostly of the waterbird persuasion. During our short trip into Texas’ subtropical scrubland, I was able to spot White-eyed Vireo, Long-billed Thrasher, Plain Chachalaca, Golden-fronted Woodpecker, and Altamira Oriole juveniles just beginning to make it on their own. Our timing was rewarding in other ways, too. We essentially had the refuge and the park to ourselves! Our host mentioned that anyone who was “out here at this time of year is committed.” I suspect that he might have meant to say that we should be committed!

I was also charmed by the abundance of nests and nesting behavior. Oriole nests, in particular, are standouts. I saw the Altamira Oriole pictured below fly directly into the nest as it swung and bobbed in the wind. It must be somewhat like living in a small boat out at sea. Altamira Oriole nests are typically woven to a fork of a tree branch and, sometimes, to a telephone wire as we saw outside of the state park. I wonder if building the nest so far from stable branches is one way to make your nest more inaccessible to predators . . . Regardless, as an amateur fiber artist, any creature that weaves or works with fiber is OK by me!

Adult Altamira Oriole and nest photographed by E. D. Lewis
An Altimira Oriole emerges from its nest of grasses woven onto the branches of a mesquite tree at Santa Ana National Wildlife Refuge. Canon EOS 7D/500mm f/4L IS USM (+1.4x TC): f/6.3, ISO 640; 1/2500. Natural light.

 What dreadful hot weather we have! It keeps me in a continual state of inelegance.—Jane Austen

©2014 Christopher R. Cunningham and Elisa D. Lewis. All rights reserved. No text or images may be duplicated or distributed without permission.

Additions to Collections and Articles

Posted by Chris Cunningham
Spirit: Adult Female Red-tailed Hawk at the Houston Audubon Raptor Shoot
Spirit: Adult Female Red-tailed Hawk at the 2014 Houston Audubon Raptor Shoot. Canon EOS 7D/100-400mm f/4.5-5.6L IS. Natural light.

Now that I have time, I’m working my way through the entire blog making edits and minor improvements. New images have been added to Avian Portraits and Stalking the Hunters. Please check them out!

Roseate Spoonbill feeding nestlings at Smith Oaks Rookery, High Island, Texas
Roseate Spoonbill Feeding Nestlings at Smith Oaks Rookery, High Island, Texas. Notice how much smaller the chick in the foreground is compared to the others. Canon EOS 7D/600mm f/4L IS (+1.4x TC). Natural light.

They always say time changes things, but you actually have to change them yourself.—Andy Warhol

©2014 Christopher R. Cunningham. All rights reserved. No text or images may be duplicated or distributed without permission.