Lawerence's Warbler - a photo on Flickriver

A Lawrences's Warbler at Colchester Pond, Vermont

"If warblers are the jewels of North American songbirds, then the Lawrence's Warbler is one rare and beautiful gem. Not only is it rare in numbers of birds observed but also in terms of its origin. This bird does not rise to full species level but is a hybrid of two recognized species, the Golden-winged Warbler (Vermivora chrysoptera) and the Blue-winged Warbler (Vermivora cyanoptera).

Many if not most hybrids of birds are thought to be infertile. However, there is an established history of fertile hybrid offspring of the mating of the Golden-winged and Blue-winged Warblers. The offspring can take one of two stereotypical forms known as Brewster's Warbler and Lawrence's Warbler. There are a number of plumage variations between these two classic types. When first discovered, the Brewster's Warbler ("Vermivora Zeucobronchialis") and the Lawrence's Warbler ("Vermivora lawrencei") were considered new species. But around 1880, William Brewster concluded that these two were in fact hybrids between the Golden-winged and Blue-winged warblers.

The Brewster's is the more commonly occurring hybrid with dominant genes while the Lawrence's is rare due to the fact that the genes that produce the plumage pattern for this hybrid are recessive and their proper combination occurs infrequently. John T. Nichols of the American Museum of Natural History worked out the initial Mendelian model for the inheritance pattern for these hybrids which was later refined by Kenneth C. Parks.
houstonaudubon.org/birding/gallery/lawrences-warbler.html

Taken in: United States / Vermont / Colchester / Colchester (show map)

Taken on: May 20, 2023

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Lawerence's Warbler

Vermivora chrysoptera x cyanoptera

ngc

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Camera: Canon EOS 5D Mark IV, f/7.1, 1/1250 sec, 500mm, ISO 1600 (more info) (hide info)

Camera:	Canon EOS 5D Mark IV
Lens:	EF500mm f/4L IS II USM
Aperture:	f/7.1
Exposure Time:	0.001 sec (1/1250)
Focal Length:	500mm
ISO:	1600
Exposure Bias:	-1/3 EV
Flash:	Off, Did not fire
Exposure Program:	Aperture-priority AE
Exposure Mode:	Auto
Metering Mode:	Partial
White Balance:	Auto
Color Space:	sRGB
Software:	Adobe Photoshop Lightroom Classic 12.2.1 (Macintosh)
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