Contents
Drinking Patterns and Behavior of Australian Desert Birds in Relation to Their Ecology and Abundance
Charles D. Fisher, Eric Lindgren, and William R. Dawson
Vocal Dialects and Gene Frequencies in the Chingolo Sparrow (zonatrichia Capensis)
Fernando Nottebohm and Robert K. Selander
Reproductive Cycle and Nesting Success of the Mountain White-crowned Sparrow (zonotrichia Leucophrys Oriantha) in the Central Sierra Nevada
Martin L. Morton, Judith L. Horstmann, and Janet M. Osburn
Temperature Regulation in Newly Hatched Laughing Gulls (larus Atricilla)
William R. Dawson, Jack W. Hudson, and Richard W. Hill
The Structure and Possible Function of the Avian Seminal Sac
Alex L. Middleton
Sexual Dimorphism in Accipiter Hawks: a New Hypothesis
Richard T. Reynolds
News and Notes
The Condor
Publications Received
The Condor
The Bulletin Board
The Condor
Cooper Ornithological Society
The Condor
Covers
Back Matter (PDF)
The Condor
Front Matter (PDF)
The Condor
Short Communications
Cranial Pneumatization in the Indain Weaver Bird, Ploceus Philippinus
Krishna Biur and J. P. Thapliyal
The Shell Pigment of Golden Eagle Eggs
Cecil C. Hyndman and Adele S. Hyndman
Prolonged and Bisexual Incubation by California Ospreys
David P. Carber and James R. Koplin
Shortness of Tail in Red-crowned Woodpeckers and Their Habit of Entering Roost Holes Backward
Lawrence Kilham
Testosterone-induced Singing in Female White-crowned Sparrows
Michael D. Kern and James R. King
Some Temperatures of Panamanian Birds
Yoshika Oniki
A Northerly Wintering Record of the Elf Owl (micrathene Whitneyi)
Charles A. Ely and Richard S. Crossin
Die-off of Common Murres on the Alaska Peninsula and Unimak Island
Edcar P. Bailey and Glenn H. Davenport
Hovering Behavior by House Finches
Patria A. Taylor
Zone-tailed Hawk and Turkey Vulture; Mimicry or Aerodynamics?
Helmut C. Mueller
Recovery of a Pennsylvania-banded Blue-gray Gnatcatcher in Western Mexico
Kenneth C. Parkes and Mary H. Clench