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Black-bellied Whistling-Duck, Laguna Atascosa NWR, Texas, 4/04. |
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Black-bellied Whistling-Duck, S. Padre Island, Texas, 4/04. |
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Ross's Goose, Larimer County, 10/06.
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Ross's Goose (center), with Snow Geese, Bosque del Apache NWR, New
Mexico, 11/05. |
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Ross's Geese (smaller, shorter-necked birds) with two Snow Geese
in flight, Bosque del Apache NWR, NM, 11/04. |
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Probable hybrid Ross's x Snow Goose, Wray, Colorado. (Note small
grin patch, intermediate-shaped bill, etc.) |
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Probable hybrid Ross's x Snow Goose Goose, Wray, Colorado. (Note
small grin patch, intermediate-shaped bill, etc.) |
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*Cackling Goose is split from Canada Goose in the 45th Supplement
to the AOU Checklist.
a. Cackling Goose (Anser hutchinsii) [the small forms] includes
the former Canada Goose subspecies hutchinsii [Richardson's], asiatica
[Bering-extinct?], leucopareia [Aleutian], taverneri [part of the Lesser
complex], and minima.
b. Canada Goose (Anser canadensis) now includes the subspecies
canadensis [Atlantic], interior [Interior], maxima [Giant], moffitti
[Moffit's], parvipes [the other part of the Lesser complex], fulva [Vancouver],
and occidentalis [Dusky].
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Atlantic Brant, Cape May, NJ, 5/06.
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Mute Swans, Cape May, NJ, 5/06. |
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Mute Swan (captive), Wray, Colorado, 4/6/02.
This pose is beautiful, but extremely aggressive. The swan didn't
like me getting close and down low near the bank, and after snapping
this shot I backed off in a hurry to avoid a pummeling! |
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Trumpeter and Tundra Swans
can be difficult to separate in the field when seen alone, distantly,
or under other difficult circumstances. For some excellent ID tips,
see David Sibley's swan
ID notes. |
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