I would imagine no one can be surprised at poor condition in these birds this 
year with the dearth of carotenoid source fruits and berries over this past 
fall and winter. This would not be permanent but could be corrected with better 
diet, correct Kevin? 

Thx 

Linda Orkin

Sent from my iPhone

> On May 5, 2017, at 5:23 PM, Kevin J. McGowan <k...@cornell.edu> wrote:
> 
> No, the most likely explanation is that it is a young male in relatively poor 
> condition. The captive experiments showed that poor diet makes for more 
> yellow and less red birds. Those ideas apply to wild birds, as well. 
> Yellowish House Finches are relatively common. I usually see a few each year.
> 
> 
> But, since you brought up the topic. I had occasion the other day to see the 
> same phenomenon (I am guessing) in PURPLE Finches, which I don't think I've 
> ever seen before. Photos of a yellowish male coming to my feeder can be seen 
> at https://ebird.org/ebird/view/checklist/S35976663.
> 
> 
> Best,
> 
> 
> Kevin
> 
> 
> 
> Kevin J. McGowan
> Project Manager
> Distance Learning in Bird Biology
> Cornell Lab of Ornithology
> 159 Sapsucker Woods Road
> Ithaca, NY 14850
> k...@cornell.edu
> 607-254-2452
> 
> 
> From: bounce-121504884-3493...@list.cornell.edu 
> <bounce-121504884-3493...@list.cornell.edu> on behalf of W. Larry Hymes 
> <w...@cornell.edu>
> Sent: Friday, May 5, 2017 4:53 PM
> To: CAYUGABIRDS-L
> Subject: [cayugabirds-l] Further info Yellow House Finch
>  
> Upon reading the literature, it appears that captive house finches can 
> have yellow coloration because of the lack of carotenoids in their 
> diet.  Would the most likely explanation for this particular bird be 
> that it escaped from captivity?
> 
> Larry
> 
> -- 
> 
> ================================
> W. Larry Hymes
> 120 Vine Street, Ithaca, NY 14850
> (H) 607-277-0759, w...@cornell.edu
> ================================
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