Showing posts with label endangered or extinct bird species. Show all posts
Showing posts with label endangered or extinct bird species. Show all posts

Friday, April 20, 2018

Reduced to "cabinet skins"?

The Artdog Image of Interest
Image 3 of a planned series of four by John James Audubon

Eskimo Curlew, 1833, by John James Audubon

In my opinion, this is one of the weirder compositions Audubon produced. Although he always had to work from dead specimens, having either shot them himself (then posed them propped up on wires) or having received skins (as with the Bachman's Warbler last week), he almost never portrayed them as dead, unless shown as prey of an avian predator.

However, in this one the female is laid out on her back as if shot. Some writers believe this is to display the feather patterns of the underside--but it is unusual. It's also a bit of a weird coincidence that he should choose to do this with a species now feared to be extinct.

Flocks of Eskimo Curlew, © Cornell Lab of Ornithology

It is ironic that this was once one of the most numerous of shorebird species. In the late 1800s, as many as 2,000,000 birds were reported killed in a year. They were reputed to be delicious, but settlers along their migratory route between South America (Brazil, Argentina, and Chile) and the tundra of Labrador and southeast Canada only began to hunt them intensively after the Passenger Pigeon had declined to near-extinction (clearly a major opportunity to learn from experience was ignored, there).

Eskimo Curlew in field, 1962, by Donald Bleitz, held in the archives of the Western Foundation of Vertebrate Zoology, California, USA

Don Bleitz (a Californian who pioneered the fast photo business, but whose heart belonged to bird photography) captured four photos of a living Eskimo Curlew in 1962, on Galveston Island in Texas; to date, they are the last known photos of living birds. You can see all four in a slideshow on Arkive.

In 1963, a specimen was shot in Barabados by someone who didn't know what it was. In 1981, David R. Blankinship and Kirke A. King documented a sighting of 23 birds believed to be Eskimo Curlews on Atkinson Island in Galveston Bay (Texas), but they didn't manage to get photos (while we regret the lack of photos, we thank the gentlemen for not shooting them in the other sense!).

A drawer full of stuffed, tagged Eskimo curlew "cabinet skins," from Natural History Museum, London.
Sadly, all we may have left of the Eskimo Curlew today are "cabinet skins." (© The Natural History Museum, London, via Martin Reid).

More recent sightings of Eskimo Curlews have been reported, but not confirmed. Thus, while it is possible that small populations still exist, the species definitely deserves its Critically Endangered listing, and it may be extinct.

In this case, a whole barrage of critical disasters befell this species, and contrived to wipe it out. Aside from the insanely intensive over-hunting in the late 1800s, predation and disease also attacked them, the spread of agriculture led to habitat loss, and a key element in their springtime diet, the Rocky Mountain Locust, also was eradicated. These poor birds had little chance, despite their once-massive numbers.

IMAGES: Many thanks to The New York State Historical Museum and Library for the photo of Audubon's artwork; to the Cornell Lab of Ornithology, via Champagnewhiskey, for the engraving of the flocks of Eskimo Curlew; unfortunately, I was unable to find a better (or larger) image of this piece; to Arkive and the Western Foundation of Vertebrate Zoology for Eskimo Curlew in field, © Donald Bleitz, 1962, held in the archives of the Western Foundation of Vertebrate Zoology, California, USA; and to Martin Reid, for providing me with a better image, and helping me improve the credit for the "cabinet skins" photo, © The Natural History Museum, London. 

Friday, April 13, 2018

Lost with the canebrakes

The Artdog Image of Interest
Image 2 of a planned series of 4 by John James Audubon


Bachman's Warbler, by John James Audubon and Maria Martin (who drew the franklinia branch--named for Benjamin Franklin). It was engraved by Robert Havell Jr. (from an 1833 watercolor by Audubon) in 1863.

This image is fascinating to me as an artist, as well as because it depicts another bird species that is believed to now be extinct. A look at the cutline shows that this was a true collaboration, between the artist-ornithologist Audubon; his protégé Maria Martin, whom he encouraged to explore her interests in natural history and art, even though she was a woman; and the engraver Robert Havell, Jr., who was descended from a distinguished English family of engravers and artists.

The collection of collaborators and associates extends even farther, however, when you consider that Audubon first learned about this species from Maria's husband, Audubon's friend the Reverend John Bachman. Bachman was a Lutheran pastor, but also a social activist and an avid naturalist. He collected specimens and documented four previously unknown-to-science species: not only the Bachman's Warbler, but also the marsh rice rat, Bachman's Sparrow, and Bachman's Hare, now called a western brush rabbit.

Bachman gave study skins to Audubon, from which he painted the birds; he never actually saw a living Bachman's Warbler. Part of the reason for this was that they tended to be shy, and they never were what you'd call plentiful. A migratory species, it wintered in Cuba, then ranged northward into the south and southeastern regions of the United States, and liked to breed in swamps or canebrakes.

Bachman's Warbler, 1906, by Louis Agassiz Fuentes, who was a Cornell ornithologist and strong advocate for scrupulously biologically accurate depictions. The male Bachman's Warbler (L) was more colorful than the female (R).

Once again, the Macaulay Library has preserved a recording of the bird's call, made by Cornell's intrepid Arthur A. Allen (remember him from last week?) and Peter Paul Kellogg. This recording was made in the rain on May 15, 1954 (thus, it is almost 64 years old), at the edge of Ft. Belvoir in Virginia (hint: probably one of the strongest, clearest examples of the bird's call comes very close to the beginning of the 5-minute recording).

A rare photograph of a male Bachman's
Warbler by Jerry A. Payne, taken in 1958.
Credible reports of sightings became rarer throughout the 1940s through 1970s, until the last credible sighting reported in the 1980s. More recent reports from the early 2000s have not been corroborated. The usual reasons are listed for the species' decline: primarily habitat loss, exacerbated by some plume hunting, and possibly a devastating hurricane in the 1930s in Cuba that may have destroyed part of their winter range.

IMAGES and MEDIA: Many thanks to the New York State Historical Museum and Library for the image of the Audubon/Martin/Havell print of the Bachman's Warbler; to Wikipedia for the Louis Agassiz Fuentes painting; to the Macaulay Library for the recording of the Bachman's Warbler's song; and to Jerry A. Payne, USDA Agricultural Research Service, Bugwood.org, via Wikipedia, for the 1958 photo of the Bachman's Warbler.