Contents
Foraging Behavior of Dendrocopos Villosus and D. Pubescenes in Eastern New York State
Donald S. Kisiel
Summer Distribution of Pelagic Birds in Bristol Bay, Alaska
James C. Bartonek and Daniel D. Gibson
The Biology of Immature Mountain White-crowned Sparrows (zonatrichia Leucophrys Oriantha ) on the Breeding Ground
Martin L. Morton, Jorge E. Orejuela, and Susan M. Budd
The Number of Ross' Geese in Central North America
J. Prevett and C. D. Macinnes
Food Habits of the Great-tailed Grackle in Brazos County, Texas
Walter R. Ii and Keith A. Arnold
Nesting Success of Common Egrets and Great Blue Herons in the San Francisco Bay Region
Helen M. Pratt
Interspecific Aggression Between Black-capped and Mountain Chickadees at Winter Feeding Stations
Michael E. Minock
Growth and Development of Young California Gulls (larus Californicus)
Jean E. Smith and Kenneth L. Diem
News and Notes
The Condor
The Bulletin Board
The Condor
Index to Volume 74
The Condor
Covers
Back Matter (PDF)
The Condor
Front Matter (PDF)
The Condor
Short Communications
A New Partial Mandible of Ichthyornis
Philip D. Gingerich
Territory Size, Clutch Size, and Food in Populations of Wrens
Martin L. Cody and Christopher B. Cody
Areal Versus Lineal Territories in the Wren, Troglodytes Troglodytes
Martin L. Cody and Christopher B. Cody
Interspecific Aggression of Resident Broad-tailed and Migrant Rufous Hummingbirds
Christopher Dunford and Eileen Dunford
Mortality of Purple Martins from Adverse Weather
Paul A. Stewart
The Occurrence of Streptoprocne Zonaris Albicincta and Ara Militaris in Chiapas, Mexico
Alfred A. Gardner
Interspecific Aggression of Ash-throated Flycatchers on Cassin's Sparrows
George T. Austin and Stephen M. Russell
King Rail and Flammulated Owl at El Paso. Texas
John P. Hubbard
Cave Swallows in Big Bend National Park, Texas
Roland H. Wauer and Donald G. Davis
Spasmodic Tic. a Behavioral Trait of the Cracidae
G. Michael Flieg and Robert E. Dooley
Piracy of Nesting Materials from and by the Broad-tailed Hummingbird
William A. Calder
New Records of Birds from British Honduras (belize), Including a Skua
Jon C. Barlow, J. A. Dick, Dora Weyer, and W. Ford Young
Bird Nests in an Aspen Tree Robbed by Black Bear
Lawrence R. Deweese and Richard E. Pillmore
Status of the White-tailed Kite in El Salvador
Walter A. Thurber and Jose Francisco Serrana
Snake Predation on Cactus Wren Nestlings
George T. Austin, Eric Yensen, and Carl S. Tomoff
Observations on Food Habits of Incubating Female Blue Grouse
Fred C. Zwickel and James F. Bendell