Wednesday, September 21, 2011

Leucistic Gray Catbird

Leucism is characterized by reduced pigmentation in animals.  Unlike albinism, leucism is caused by a reduction in all types of skin pigment, not just melanin (Wikipedia).  Leucistic animals usually have normal-colored eyes; albinos' eyes often are pink. Frequently, like in this catbird, with its white throat and bill tip, leucism is patchy, resulting in regular-colored animals with patches of white. This condition is called partial luecism. I banded and released this Gray Catbird near Northfield on 19 September 2011.

2 comments:

  1. I just wrote about one of these guys I had in my yard in Maine a couple of summers ago (www.burlybird.blogspot.com), so cool to see you had one too!

    Happy birding!

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  2. Thought you might like to see the one we had hanging around this past autumn;
    http://www.flickr.com/photos/72163737@N07/10076168834/

    Greg Miller

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