Additions to Articles

All the revision in the world will not save a bad first draft: for the architecture of the thing comes, or fails to come, in the first conception, and revision only affects the detail and ornament, alas!–T. E. Lawrence

Magnolia Warbler, Lafitte's Cove, Galveston Island, Texas
Magnolia Warbler During Fall Migration, Lafitte’s Cove, Galveston Island, Texas. Canon EOS 7D/600mm f/4L IS (+1.4x TC). High-speed synchronized fill-flash.

From time-to-time I like to expand upon earlier writings. This week I added some thoughts and images to The Four Seasons of Birding: A Retro-prospective. Please take a look!

©2015 Christopher R. Cunningham. All rights reserved. No text or images may be duplicated or distributed without permission.

Seas and Shores of the Imagination

We climb a ridge, and a shout of surprise involuntary arises from our lips as we find the waters replete with strange animals, and the sun above us darkened by the wings of great flying dragons . . . . Charles H. Sternberg (Popular Science News, December, 1898)

Pelicans Soar Above Turbulent Seas, Bryan Beach, Texas
Pelicans—or if You Squint, Pterosaurs–Soar Above Turbulent Seas, Bryan Beach, Texas. Canon EOS 7DII/600mm f/4L IS (+1.4x TC). Natural light.

Last Sunday we took an excursion to Bryan Beach and the lagoons behind. On this day, the seas were rough, and I watched in awe as Brown Pelicans sailed through the troughs of a churning waterscape. I couldn’t help but think of the spectacular scenes of the Late Cretaceous Epoch painted by Charles R. Knight (at the absolute height of his powers) for the Field Museum of Natural History in Chicago in the late 1920’s—especially the oft-reprinted breaching mosasaur and turtle with Pteranodon skimming the giant swells in “turquoise, gray, and rose” (Knight’s words).

 

I like to imagine that places like Bryan Beach and environs are not unlike much of what Midcontinent North America was like when the Western Interior Seaway connected the Gulf of Mexico with the Arctic. But of course there are tremendous differences: Texas Gulf Coast bays, for example, typically have only about 15 cm of tidal variation in sea-level, but mathematical models of the Western Interior Seaway suggest that it was subject to around 0.5-1.0 m of tidal variation along the southern boundary (e.g., Erickson and Slingerland, 1990).

To my imagination, this suggests vast areas of tidal channels, mudflats, and marshes dotted with countless millions of birds hunting, fishing, and probing for prey. But except for birds like Hesperornis (and kin) and Ichthyornis what these birds were like remains largely a mystery as only fragmentary remains assigned to around twenty or so genera are known.

A mixed flock of waders hunts among a school of small fish, Bryan Beach, Texas
A Mixed Flock of Waders Fishing, behind Bryan Beach, Texas. Here a white morph Reddish Egret participates in a “drive” of small fish across a shallow lagoon. Note the dark morph Reddish Egret in the upper left corner. Canon EOS 7DII/600mm f/4L IS (+1.4x TC). Natural light.

The main reason I frequent the shallow lagoons behind Bryan Beach (other than reverie) is that this area is a reliable spot to see Reddish Egrets, both dark and white morphs. On this trip, we saw both color phases. I was especially excited to see Reddish Egrets hunting alone and in mixed flocks of waders and shorebirds. At one point, a large group of White Ibises, Snowy Egrets, Lesser Yellowlegs, and Dowitchers encountered a school of small fish and swept across the lagoon together in a communal fishing “drive.” Sometimes the Reddish Egrets broke off from the flock and fished alone—although sometimes a few Snowy Egrets, Lesser Yellowlegs, or Dowitchers shadowed them.

With a little imagination it’s easy to envision such scenes occurring along the tidal mudflats and lagoons of the Western Interior Seaway. Squinting at the above scene, it might be easy to believe that you are seeing the Cretaceous cousins of today’s birds. But sorting out the taxonomic nightmare of what you are seeing would have been a bit dicier in the Late Cretaceous than it is today. Feathers, it seems, were widely distributed among dinosaurs, so many of those little feathered bipeds hunting and fishing across those mudflats were not close modern bird relatives at all, but rather dinosaurs, or perhaps even more likely, members of the strictly Mesozoic avian groups that perished at the end of the Cretaceous Period.

Reddish Egret (White Morph), near Bryan Beach, Texas
A Reddish Egret (White Morph) Fishes Alone, behind Bryan Beach, Texas. Canon EOS 7DII/600mm f/4L IS (+1.4x TC). Natural light.

Finally, sometimes lost in my imaginary Cretaceous, I have to remind myself that I can stray to the waters’ edge—no fear in our time of being confused with a small dinosaur . . . and a mosasaur bolting from the shallows and dragging me kicking and screaming into the surf.

Reference

Erickson, M.C. and Slingerland, R. 1990. Numerical simulations of tidal and wind-driven circulation in the Cretaceous Interior Seaway of North America. Geological Society of America Bulletin 102 (11): 1499-1516.

©2015 Christopher R. Cunningham. All rights reserved. No text or images may be duplicated or distributed without permission.

Quest for the New

Of all the passions of mankind, the love of novelty most rules the mind. In search of this, from realm to realm we roam. Our fleets come loaded with every folly home.—Foote, in Treasury of Wisdom, Wit, and Humor by Adam Wooléver (1891, 5th ed., p.301)

Green Kingfisher, World Birding Center, Edinburg, Texas
Female Green Kingfisher, World Birding Center, Edinburg, Texas. Although cagey and suspicious, kingfishers are among my favorite birds. Whenever I hear their clicking (or clattering, depending on species), I hope for a photo-op . . . but they rarely oblige. This was my first quality encounter with a Green Kingfisher. Canon EOS 7D/500mm f/4L IS (+1.4x TC). Natural light.

As one tied to the work-a-day world most of the time, finding new things in the field is always exciting. First (quality) encounters with species are my favorites, but observing new behaviors by familiar ones often must suffice. Last weekend, for example, a naturalist friend (RD) pointed out the barn spider below apparently eating her own web—something I’d not seen a spider do before. It is widely held that spiders do eat webs to re-utilize protein, and the one below appeared to be doing just that.

A Barn Spider Consumes her own Web, Pilant Lake, Brazos Bend State Park, Texas
A Barn Spider Consumes Her Own Web, Pilant Lake, Brazos Bend State Park, Texas. Eventually the spider ate the entire strand to the upper right. Canon EOS 7DII/600mm f/4L IS. Natural light.

But based on the severe limitations of time and money, I usually have to find “novelty” where I can. For example, the recent shot below of a newly-returned-from-the-Arctic-for-the-winter Black-bellied Plover may reflect my closest contact with this species.

Admittedly the self-imposed pressure of always looking for new things can sometimes defeat the purposes of amateur nature photography: learning about nature and relieving the stress and strain of daily life and possibly extending life itself. Elisa is clearly better at simply getting out there and enjoying the sights and sounds and sensations. I have to (paradoxically) work on not working so hard.

Portrait: Black-bellied Plover, East Beach, Galveston Island, Texas
Portrait: Black-bellied Plover, East Beach, Galveston Island, Texas. By October, many shorebirds have returned to the Texas Gulf Coast for winter. Canon EOS 7DII/600mm f/4L IS (+1.4x TC). Natural light.

©2015 Christopher R. Cunningham. All rights reserved. No text or images may be duplicated or distributed without permission.

The Odyssey of the Brown Pelican

The story as told in The Odyssey doesn’t hold water. There are too many inconsistencies.–Margaret Atwood

Juvenile Brown Pelican in Flight, near Frenchtown Road, Bolivar Peninsula, Texas
Juvenile Brown Pelican in Flight, Galveston Bay, near Frenchtown Road, Bolivar Peninsula, Texas. Canon EOS 7DII/600mm f/4L IS (+1.4x TC). Natural light.

Last weekend we made the most of the phenomenal weather and birded the Coast, specifically East Beach, Galveston, and Frenchtown Road, Bolivar Peninsula. Although the weather was amazing, not many birds were around, Brown (and a few American White) Pelicans, excepted. A spectacular frenzy of diving for fish that I observed near Frenchtown Road got me thinking about Brown Pelicans.

A Brown Pelican Manipulates a Fish into Swallowing Position, near Frenchtown Road, Bolivar Peninsula, Texas
A Brown Pelican Manipulates a Fish into Swallowing Position, Galveston Bay, near Frenchtown Road, Bolivar Peninsula, Texas. Canon EOS 7DII/600mm f/4L IS (+1.4x TC). Natural light.

I was tempted to repeat the oft-told (and published) tale of how how DDT usage caused the decline of these birds in the U.S. through egg shell thinning, and how they rebounded once the pesticide was outlawed. An offhanded recent comment by an astute friend with a chemistry background (DT) that “DDT doesn’t cause egg shells to thin” gave me pause, though.

A quick internet search revealed a wealth of information about the numbers of Pelicans present in Texas and California in the early to mid-20th Century, as well as other potential causes for the collapse of Brown Pelican populations. I would encourage readers to do their own search and come to their own conclusions . . . . but by my reading of history, in California, the story involves oil spills (note ingested oil does cause thinning of egg shells), disease (Newcastle Disease, specifically), and (horrifyingly) the outright killing and disturbance of nesting birds by, of all people, government employees.

In Texas, the story appears more straightforward: hunters and fisherman in the early 20th Century (before DDT) simply shot most of them. Since the Brown Pelican was placed upon the Endangered Species List in 1970, its numbers have rebounded—and I for one am delighted.

A Pacific Brown Pelican Comes in for a Landing, Offatt's Bayou, Galveston Island, Texas
The Holy Grail of Pelican Sightings in Texas: A California Brown Pelican Comes in for a Landing, Offatt’s Bayou, Galveston Island, Texas. Atlantic and Gulf populations of Brown Pelicans have blackish-green throat pouches. Pacific Coast populations have brilliant red throat pouches. This photograph was taken the same day we saw a Pacific Loon, another Texas Gulf Coast rarity. Sometimes birds don’t read the field guides. Canon EOS 7D/500mm f/4L IS (+1.4x TC). High-speed synchronized fill-flash.

©2015 Christopher R. Cunningham. All rights reserved. No text or images may be duplicated or distributed without permission.

Dreaming of Cold Weather Coastal Birding

The sea, once it casts its spell, holds one in its net of wonder forever.–Jacques Yves Cousteau

Cormorant Portrait, Leonabelle Turnbull Birding Center, Mustang Island, Texas
Neotropic Cormorant, Leonabelle Turnbull Birding Center, Mustang Island, Texas. Unperturbed, this bird fished a few feet from the photographer. Neotropic Cormorants are far more tolerant of humans than their Double-crested cousins. Canon EOS 7D/600mm f/4L IS (+1.4x TC). Natural light.

The time is almost here . . . the time when the wretched heat finally breaks once and for all, and we can look forward to the longest stretch of pleasant weather on the Texas calendar. And the place to spend this glorious time is undoubtably on the coast.

Long-billed Curlew, Indian Point Beach, Corpus Christi, Texas
Displaying Long-billed Curlew, Indian Point Beach, Corpus Christi, Texas. This bird was trying unsuccessfully to communicate with me. Canon EOS 7D/600mm f/4L IS (+1.4x TC). Natural light.

Once those blue northers start blowing in, it’s off to the field at every opportunity! We’re already hatching plans for visits to Frenchtown Road, Galveston, and Mustang Island. Beaches, estuaries, and lagoons, here we come!

American White Pelicans Discover a School of Fish, East Beach, Galveston Island, Texas
American White Pelicans Discover a School of Fish, East Beach, Galveston Island, Texas. White Pelicans steam along the shallows single-file until they encounter a school of fish—when they form a ring of co-operative feeding. Canon EOS 7D/600mm f/4L IS (+1.4x TC). High-speed synchronized fill-flash.

©2015 Christopher R. Cunningham. All rights reserved. No text or images may be duplicated or distributed without permission.