Contents
A New Species of Antpitta from Peru and a Revision of the Subfamily Grallariinae
George H. Lowery Jr. and John P. O'Neill
Tolerance of Cold and Bergmann's Rule
S. Charles Kendeigh
In Memoriam: Robert Porter Allen
Alexander Sprunt IV
Navigation by Hawks Migrating in Spring
Helmut C. Mueller and Daniel D. Berger
Myology of the Leg in Swallows
Abbot S. Gaunt
Bioenergetics of the Breeding Cycle of the Ring Dove
I. Lehr Brisbin Jr.
Weight Loss of Birds during Nocturnal Migration
D. J. T. Hussell
Taxonomic Aspects of Avian Hybridization
Lester L. Short
Thayer's" Gull in the Niagara Frontier Region"
Robert F. Andrle
Proceedings of the Eighty-sixth Stated Meeting of the American Ornithologists' Union
L. Richard Mewaldt
Periodical Literature
The Auk
Notes and News
The Auk
General Notes
Nesting Behavior of the Chestnut-and-black Weaver
C. F. Eaglesfield
Notes on the Boat-billed Heron in Surinam
F. Haverschmidt
The Roseate Spoonbill Breeding in Surinam
F. Haverschmidt
Grackle Anting with a Mothball
Charlotte A. Dubois
Extra Toes on the Halluces of a Common Snipe
Michael J. Fogarty
Pathological Changes Associated with Birdshot Embedded in Sandpiper Muscle Tissue
Michael Kent Rylander
Hairy Woodpeckers Feeding on Pine Seeds
Patrick L. Stallcup
Spread-wing Postures in Pelecaniformes, Ciconiiformes, and Falconiformes
George A. Clark Jr.
Mississippi Kites Fledge Three
Lena G. Mcbee
Dual Calling by Birds of Paradise
James J. Dinsmore
White-fronted Goose Specimen from Alabama
Thomas Z. Atkeson Jr.
Prey in Two Screech Owl Nests
Paul A. Stewart
A Great White Heron in Great Blue Nesting Colony
Griffing Bancroft
Nesting Records of the Eared Grebe in Mexico
Robert W. Dickerman
The Snowy Plover in Missouri
David A. Easterla
Two Male House Sparrows Copulating on Ground with Same Female
Hervey Brackbill
Covers
Front Matter
The Auk
Back Matter
The Auk