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Juvenile Forster's tern with "fresh from ...
Wastewater Treatment pond along San Francisco Bay
Mature Forster's will have a full black cap ...
Little one's are Forster's larger is a ...
An exclusively North American tern.
Non breeding plumage is characterized by the black eye patch and a black bill, ...
Forster's Terns are similar to the winter ...
"One of several medium-sized terns that are similar in appearance, the