Cackling/Canada
Goose Split |
*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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Richardson's (hutchinsii) Cackling Goose, Pueblo County,Colorado,
11/06. |
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Mixed flock of Cackling & Canada Geese, Larimer County, Colorado,
11/05. |
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Cackling Goose (neck band # K88) with Canada Geese, Boulder County,
Colorado, 12/04. |
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Cackling Goose (foreground) with Canada Goose, Weld County, Colorado,
11/04. |
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Cackling Goose (left) with Canada Goose, Weld County, Colorado, 11/04.
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Cackling Goose (foreground) with Canada Goose, Weld County, Colorado,
11/04. |
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Cackling Goose with bright neck ring, Broomfield, Colorado, 1/04. |
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Pair of Cackling Geese in flight, Broomfield, Colorado, 1/04. Note
the white neck collars that are present in some Canada Geese. (This is
more common in smaller forms, I believe.) |
Canada Geese in flight, Larimer
County, Colorado, 1/07. |
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Lesser (parvipes) and Greater (moffiiti-type) Canada
Geese, Larimer County, Colorado, 9/06.
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Lesser (parvipes) Canada Goose, Larimer County, Colorado,
9/06. This subspecies normally arrives in Colorado in the winter- this
bird was seasonally out of range, perhaps paired with Greater Canada
Goose above, with neck band.
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Canada Geese, Pueblo County, Colorado, 11/06.
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Canada Goose head close-up, Broomfield County, Colorado, 1/06. |
Canada Geese, Douglas and Boulder Counties, 2/06. (following three
rows)
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Partial albino Canada Goose, Tacoma, Washington, 9/05. |
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Canada Goose gosling, Tawas Point, MI, 5/05. |
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Canada Goose gosling, Tawas Point, MI, 5/05. |
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Canada Goose pair showing differences in size and coloration, Cherry
Creek Reservoir, Arapahoe County, Colorado, 3/05. |
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Canada Goose (probably moffitti) head detail, Boulder County,
CO, 2/05. |
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Canada Geese, Greeley, Colorado, 12/03. |
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Leucistic Canada Goose, Boulder County, Colorado, 1/05. Although hard
to see in this photo, the dark neck and head areas are brown, not black. |
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Partial albino Canada Goose, Greeley, Colorado, 12/03. |
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Canada Geese taking flight, Lagerman Reservoir, Longmont, Colorado,
11/03. |
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Canada Goose, Walden Ponds, Boulder, Colorado, 7/03. |
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Canada Geese, Broomfield, Colorado, 7/03. |
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Partially albino Canada Goose, Cherry Creek Reservoir,
Arapahoe County, Colorado, 11/02. |
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Another odd-plumaged Canada Goose, Cherry Creek Reservoir,
Arapahoe County, Colorado, 12/14/02. |
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Canada x Snow Goose hybrid? Or partially albino Canada Goose?? Boulder
County, Colorado, 12/06. |
Canada x Pond Goose (domestic) hybrid, Pueblo County, Colorado, 11/06.
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Hybrid Canada X Greater White-fronted Goose(?) with Canada & Cackling
Geese, Dodd Reservoir, Boulder County, Colorado, 1/06. |
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Hybrid Canada X Greater White-fronted Goose(?), Bittersweet Park,
Greeley, 12/03. |
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One of 3 possible hybrid Canada X Greater White-fronted
Geese present at Waneka Lake, Lafayette, Colorado, 11/29/02. Note dark
breast, white "front", and light bill, like GWFG. However, this
bird lacked the barring on the belly and the white lateral line of GWFG.
Not seen in this photo is an orange foot that I observed in another swimming
photo. |
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Another possible hybrid Canada X Greater White-fronted
Goose, Waneka Lake, Lafayette, Colorado, 11/29/02. This one has a bit
more prominent cheek patch and breast patterning like a Canada Goose,
but a light bill and face patch more like a Greater White-fronted. Its
upper leg, not visible in this photo, appeared to be light gray. |
