payneguin's picture

Strange bird

Observed: 9th April 2011 By: payneguin
bird.JPG
Description:
Identifications
Species interactions

No interactions present.

Species with which Blackbird (Turdus merula) interacts

Comments

MrMoto's picture

hello

that's what I thought looks like a blackbird also.

anonymous spotter's picture

Not necessarily a "disorder" -

this sort of leucism seems quite common in blackbirds. Apart from possibly making them stand out to predators, it seems to have no ill effects.
Sometimes it appears to persist from year to year, in other cases what appears to be the same bird (based on habits or other features) may show white areas after a moult.
To human eyes it can seem quite beautiful, and it certainly helps working out what individual birds are doing!
I assume it's genetic, but have no knowledge of that.