The photos in this directory were downloaded from the Library of Congress website. They and others like them can be found in the directory "Free to Use and Reuse Sets".

URL for Free to Use and Reuse Sets: 
https://www.loc.gov/free-to-use/

URL for the set in this directory:
https://www.loc.gov/free-to-use/birds/

filename: audubon-tanager
Summer red bird. Tanager. , . [No Date Recorded on Caption Card] Photograph. https://www.loc.gov/item/2002718919/.

filename: mallard-ducks
Pope, Alexander, Artist. The mallard duck Anas boschas Linnæus / / A. Pope Jr. , 1878. New York: Charles Scribner's Sons, Boston: Armstrong & Co. Photograph. https://www.loc.gov/item/2018663013/.

filename: florida-pier
Highsmith, Carol M, photographer. This pier, owned by the Edgewater Lodge on Long Key in the Florida Keys, often becomes a virtual bird sanctuary. United States Long Key Florida, None. [Between 1980 and 2006] Photograph. https://www.loc.gov/item/2011633169/.

filename: feeding-pigeons
Rizzuto, Angelo, photographer. Man and Woman Feeding Birds. United States New York New York State, 1954. [08/54] Photograph. https://www.loc.gov/item/2020636143/.

filename: burrowing-owl
Highsmith, Carol M, photographer. A young burrowing owl has found a haven conveniently provided in a piece of storm pipe at the Phoenix Zoo in Phoenix, Arizona. This species, which favors deserts and grasslands, is adept on the ground but does fly. It favors land operations in fall and winter, during breeding and chick-raising seasons. United States Arizona Phoenix, 2018. -11-15. Photograph. https://www.loc.gov/item/2018702261/.