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House Sparrow ID - UK (1 Viewer)
- Thread starter NKR2017
- Start date
Nutcracker
Stop Brexit!
Both fledgelings - yellow gape at the corner of the bill.
Agree the left bird is yellower than normal (xanthochroism, not leucism).
Agree the left bird is yellower than normal (xanthochroism, not leucism).
Yes, both fledglings as you say—didn’t look at the normal sparrow’s bill before.
Xanthochroism you think and not just the kind of overall fading characteristic of some types of “leucism” (i. e., in the loose way that the term is used by birders)?
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Thanks fugl, Nutcracker- this is really interesting information!
Last September, I saw another sparrow with similar colouration, including yellowy legs - see attachment (for comparison, I've included a shot of a more typical sparrow in a similar position).
Would the different colouring of the legs support the leucism/xanthochroism theory?
Last September, I saw another sparrow with similar colouration, including yellowy legs - see attachment (for comparison, I've included a shot of a more typical sparrow in a similar position).
Would the different colouring of the legs support the leucism/xanthochroism theory?
Attachments
Bird color aberrations is a complex and (very) controversial subject. This will take you well into the weeds—
http://www.sibleyguides.com/2011/08/...nin-reduction/
