Canvasback, Aythya valisineria, female showing male characteristics, Detroit River, Ontario, Canada

Canvasback, Aythya valisineria, female showing male characteristics, Detroit River, Ontario, Canada

Filename

Canvasback_20180117-163332_DSC1827.jpg

Copyright

©David Stimac

Image Size

5341x3561 / 10.6MB

Canvasback Aythya valisineria Detroit River Ontario Canada winter hen female duck male drake pochard diving diver great lakes ovary loss hormone plumage hormonal estrogen testosterone

Contained in galleries

Waterfowl Archive