Slide #29.09.43 - Adult, alternate (Jul 17). Photograph © James R. Gallagher. Original available from the Sea and Sage Audubon Library of Nature.
Slide #29.09.53 - Adult, basic (Jan 18). Photograph © James R. Gallagher. Original available from the Sea and Sage Audubon Library of Nature.
Slide #29.09.32 - Juvenile (Jul 24). Photograph © James R. Gallagher. Original available from the Sea and Sage Audubon Library of Nature.
Slide #29.09.24 - 1st year, basic (Jan 18). Photograph © James R. Gallagher. Original available from the Sea and Sage Audubon Library of Nature.
Slide #29.09.22 - 2nd year, basic (Jan 18). Photograph © James R. Gallagher. Original available from the Sea and Sage Audubon Library of Nature.