| Common Name: | Duck, Ring-necked | | Scientific Name: | Aythya collaris | | Family: | Anatidae | | Area: | male - Lake Havasu - Bill Williams River National Wildlife Refuge, Arizona | | Date: | March 2, 2010 | 
The ring on the base of the neck of the male is usually impossible to see, but the white ring on the bill is much easier to notice, plus the male has an additional white margin at the base of the bill. | 
female - Lake Havasu - Bill Williams River National Wildlife Refuge, Arizona --- March 2, 2010 The female has a dark crown and a wide pale area at the base of the bill. | | Reference: | National Geographic Field Guide to the Birds of North America |
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