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Fun pictures!  Looks to me like a lot of Snow Goose and a lot of Blue 
Goose - but with that size and that bill I can't imagine Ross' had 
anything to do with your bird(s).

I'll stick to pipits.

Pipit.

Terry Wright wrote:
> Pat/Chris,
>
> Thanks for pointing to the National Geo guide.  It does indeed show 
> this color variant!   I've since checked Madge & Burn, Stokes, Audubon 
> Master Guide, Kaufman, etc. and none other, that I own, shows this 
> 'white-bellied blue morph'.  As for size, at least one bird was 
> definitely of greater snow size. 
> I've posted a couple digiscoped images here:   
> http://www.jjaudubongallery.com/Bird_Pics/Snow%20Geese%20101506.htm
>
> Best,
>
> Terry
>
> Fred and Chris Pratt wrote:
>> Terry,
>>
>> This isn't my area of expertise (assuming I have one), but geese show 
>> variations of size and plumage that leave us all guessing.  The 
>> National Geographic Guide shows a "blue phase variant" with plenty of 
>> white on the belly, though with only a bit of dark on the neck. Is it 
>> close in appearance to your birds?
>>
>> I would assume Ross's x Blue hybrids would be smaller than a typical 
>> Blue - but who knows?
>>
>> Pipit.
>>
>> Terry Wright wrote:
>>> Quoting from Sibley's:
>>>
>>> "The combination of dark neck and white belly is not shown by snow 
>>> goose."  (The Sibley Guide to the Birds, first edition, Chanticlear 
>>> press, 2000, p78.)
>>>
>>> Either I am misinterpreting this quote or someone forgot to tell the 
>>> snow geese this 'fact', or maybe new color morphs have arisen since 
>>> publication???  Today at the DCWMA we observed at least 5 individual 
>>> blue-phase snow geese with white bellies.   Could these be Snow x 
>>> Ross' hybrids?  They certainly were NOT Ross's Goose!   I can send 
>>> pictures to anyone interested in this topic.
>>>
>>> Discussion on this observation most welcome!
>>>
>>> Terry  
>>
>>
>>
>