Contents
The Geographical Variation of the Fulmar (fulmarus Glacialis) and the Zones of Marine Environment in the North Atlantic
Finn Salomonsen
Behavioral Interactions of Red-winged Blackbirds and Common Grackles on a Common Breeding Ground
John A. Wiens
Ontogeny of the Supernumerary Sesamoids in the Leg Muscles of the Ring-necked Pheasant
George E. Hudson, Sy Ying Chen Wang, and Ernest E. Provost
Attentiveness of Cranes at Their Nests
Lawrence H. Walkinshaw
Recent Literature
The Auk
Notes and News
The Auk
General Notes
Recent Records of the Eskimo Curlew
Francis M. Weston and Ellison A. Williams
Two Probable Hybrid Gulls from New Jersey
Joseph R. Jehl Jr. and Robert C. Frohling
Natal Plumage Characters in Rails
David Kenneth Wetherbee and Brooke Meanley
Variations in Plumage of Male and Female Pipra Aureola
F. Haverschmidt
Predation on Birds by the Cattle Egret
Richard L. Cunningham
Wing-stretching of Red-bellied Woodpeckers
David W. Stickel
Ring-billed Gulls Feed on Flying Ants
Helmut C. Mueller and Daniel D. Berger
Testicular Response to an Increased Photoperiod in the Brown-headed Cowbird
A. L. A. Middleton and D. M. Scott
Some Information from Barn Owl Pellets
Richard C. Banks
Breeding Sites of Sterna Eurygnatha and Other Sea Birds Off the Brazilian Coast
Helmut Sick and Aristides P. A. Le
Molothrus Bonariensis Parasitizing Fluvicola Pica and Arundinicola Leucocephala in Surinam
F. Haverschmidt
Covers
Front Matter
The Auk
Back Matter
The Auk