Male Ring-necked Duck (Aythya collaris)
Location: Sprague Lake, Rocky Mountain National Park, Colorado, USA
I saw this male Ring-necked Duck and his mate paddling around near a marshy area along the shore of of Sprague Lake, in Rocky Mountain National Park, Colorado. Seeing it first from a distance, I thought it might be a Wood Duck. When it came a bit closer I noticed the distinctive white markings on the bill.