American Goldfinch, Nikon D750, Sigma 150mm / f2.8 APO EX DG HSM

Several bird species change their feathers twice a year during the molt. The most apparent one here in spring is the American Goldfinch. The males give up their olive-gray to olive-brown winter feathers and change to a bright yellow body. The shot was made right through my office window and as you can see the goldfinches are not completely done yet with their spring molt.