Vol. 48, pp. 159-168 November 15, 1935 PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON ^^rifljj^. _ ^li^-'" ^'^^f^t {(^ APR 2 NATURAL HISTORY OF PLUMMERS ISLAND^ MARYLAND. IV. Birds.' BY A. K. FISHER. The accompanying list of 186 species and 4 additional sub-species is a synopsis taken from an extensive manuscript in which statements as to the habits and occurrence of the various species are given in detail. It includes all forms that have been reported on the property of the Washington Biologists' Field Club from the first records of the Club to October, 1935. Species that have been found nesting on the mainland property are indicated by one asterisk, and those recorded breeding on the island proper by two asterisks.^ Gavia immer immer, Common Loon. Adult seen at west end of island, June 2, 1907. Gavia stellata, Red-throated Loon. One seen off island October 30, 1904. Colyrnbus auritus, Horned Grebe. Casual spring and autumn migrant; earliest April 14, latest October 27. Podilymbus podiceps podiceps, Pied-billed Grebe. Once seen near ferry, Phalacrocorax auritus auritus, Double-crested Cormorant. One seen at lower end of island, May 6, 1917. Ardea herodias herodias, Great Blue Heron. Ice permitting, this species may be seen any time of year. Most frequent April 1-October 14. iFor Nos. I, II, and III of this series, see Proc. Biol. Soc. Washington, xlviii, 1935, pp. 115-137. 2Editor's Note. — The author does not concur in the nomenclature, nor, in part, in the classification followed, which has been made to conform with the fourth (latest) edition of the Check-list of North American Birds of the American Ornithologists' Union, published in 1931. 32— Proc. Biol. Soc. Wash., Vol. 48, 1935. (159)
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