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Bird Identification Q&A
Carcass of white heron, Finland
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<blockquote data-quote="Jan-Paul Charteris" data-source="post: 1248991" data-attributes="member: 71800"><p>I think colour deficiency would be more likely, otherwise surely skins of Kestrel would resemble Lesser Kestrel in that respect?! Also colour deficiency in one of the non-white heron species might be the explanation for this bird anyway (although I can't think what species and I know its been speculated on in earlier posts).</p><p>I wondered whether the egret I linked to might also be showing some kind of plumage/bare-part anomaly too? the jowled appearance rules out Little Egret and most other species, and could fit Cattle or Intermediate Egret but the eye and lores are very pale washed out yellow and fit neither species and the hint of yellow in the feathers on the forehead doesn't either. One other thing about that bird is the hunched posture and neck pouch seem to suggest a longer necked species than Cattle. </p><p>Some questions, not necessarily relevant but it may be; can true albinos show yellow as opposed to pink bare parts? Does xanthochroism affect bare parts but not plumage sometimes? Is there any tendency or possibility for xanthochroism and albinism to occur together?</p><p></p><p>Jan</p></blockquote><p></p>
[QUOTE="Jan-Paul Charteris, post: 1248991, member: 71800"] I think colour deficiency would be more likely, otherwise surely skins of Kestrel would resemble Lesser Kestrel in that respect?! Also colour deficiency in one of the non-white heron species might be the explanation for this bird anyway (although I can't think what species and I know its been speculated on in earlier posts). I wondered whether the egret I linked to might also be showing some kind of plumage/bare-part anomaly too? the jowled appearance rules out Little Egret and most other species, and could fit Cattle or Intermediate Egret but the eye and lores are very pale washed out yellow and fit neither species and the hint of yellow in the feathers on the forehead doesn't either. One other thing about that bird is the hunched posture and neck pouch seem to suggest a longer necked species than Cattle. Some questions, not necessarily relevant but it may be; can true albinos show yellow as opposed to pink bare parts? Does xanthochroism affect bare parts but not plumage sometimes? Is there any tendency or possibility for xanthochroism and albinism to occur together? Jan [/QUOTE]
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Bird Identification Q&A
Carcass of white heron, Finland
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