https://digitalcommons.usf.edu/ffn/vol23/iss3/4/
"A Communal Roost of Gray Catbirds at Eco Pond, Everglades National Par" by Fred J. Alsop III
By Fred J. Alsop III, Published on 01/01/95
communalroostgraycatbirdseco
https://open.library.ubc.ca/soa/cIRcle/collections/facultyresearchandpublications/52383/items/1.0396163
Migration ecology of western gray catbirds - UBC Library Open Collections
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migrationecologywesterngraycatbirds