The Wilson bulletin (1921) (14565987257), 1921

Upper left: gibralta[r] rock from the south, columbia county, wisconsin, upper right: young duck hawks (peregrine falcon), removed from nest, lower left: nesting ledge of duck hawk in sauk county, wisconsin, lower right: gibralta rock. Where duck hawk invariably alighted identifier: wilsonbulletin33agas (find matches) title: the wilson bulletin year: 1894 (1890s) authors: agassiz association. Wilson ornithological chapter wilson ornithological society wilson ornithological club nebraska ornithologists' union subjects: birds publisher: columbus, ohio: wilson ornithological society. Date: 1921.