It may be melanism, an increase in black pigments. I have seen a Canada
Goose with a head that was almost completely back.

- Adri

On Monday, June 6, 2016, Thomas Guisinger <
[log in to unmask]> wrote:

> Early this spring I had a young Mourning Dove (that was almost black)
> visit our backyard. I thought it had gotten in something that caused this
> coloration. I have seen this bird two or three times since. If anything it
> is darker. I am trying to get a picture, but it doesn't visit often and the
> last time it didn't hang around and pose for me. Has anyone else seen a
> 'dark' Mourning Dove?
>
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