Contents
Morphology of the Sublingual Pouch and Tongue Musculature in Clark's Nutcracker
Walter J. Bock, Russell P. Balda, and Stephen B. Vander Wall
Occurrence of Birds in the Beaufort Sea, Summer 1969
George W. Frame
A Spectrographic Analysis of Burrowing Owl Vocalizations
Dennis J. Martin
Middle American Races of the Eastern Bluebird
J. Dan Webster
The Daily Rhythm of Hawk Migration at Cedar Grove, Wisconsin
Helmut C. Mueller and Daniel D. Berger
Female Spruce Grouse Activities during Laying and Incubation
K. H. Mccourt, D. A. Boag, and D. M. Keppie
Age-specific Changes in the Major Body Components and Caloric Value of Growing Japanese Quail
I. Lehr Brisbin Jr. and Lucy J. Tally
Fall and Winter Foods of Ruffed Grouse in Interior Alaska
Jerry D. Mcgowan
Robbing Behavior of Roseate Terns
Euan K. Dunn
Solitary Sandpiper Early Reproductive Behavior
Lewis W. Oring
In Memoriam: Arlie William Schorger
Joseph J. Hickey
Periodical Literature
The Auk
Obituaries
The Auk
Notes and News
The Auk
General Notes
Range and Affinity of the Pale-bellied Mourner (rhytipterna Immunda)
Wesley E. Lanyon and C. H. Fry
Cedar Waxwing Courts White-throated Sparrow
Daniel J. Loncke
Jabiru in South Texas
Harry H. Haucke and William H. Kiel Jr.
A Mammalian Convergence on the Avian Tarsometatarsus
Pat Vickers Rich
First Record of Sooty Shearwater for Arizona
Raymond J. Quigley
First Utah Record of the Baltimore Oriole
Gary L. Worthen
Unusual White-throated Sparrow Nest
William F. Davis
Willets in Southern Brazil
William Belton
Ventriloquism in a Wilson's Plover
Robert A. Duncan
Unusual Bird Records from Southeastern Oregon
Carroll D. Littlefield and Eldon L. Mclaury
Tail Flashing Display in the Whip-poor-will
James A. Bruce
Gopher Snake Predation on the Common Bushtit
Stephen Ervin and Cynthia Rose
First Brown Booby Specimen from Texas
Warren M. Pulich and Warren M. Pulich Jr.
Census of Kirtland's Warbler in 1972
Harold F. Mayfield
Albinism in a Population of Blue Jays
Amelia R. Laskey
Least Bittern Nesting Colonially
James A. Kushlan
Migrational Homing by a Pair of Mallards
Thomas J. Dwyer, Scott R. Derrickson, and David S. Gilmer
A Possible Hybrid Wattled Ja
Burr J. Betts
The Least Bittern in Mexico and Central America
Robert W. Dickerman
Ross' Geese Nesting in Manitoba
John P. Ryder and Fred Cooke
Interspecific Nest Parasitism by Ducks and Coots in Utah
David E. Joyner
First Arctic Tern Recorded in Idaho
Thomas D. Burleigh
Covers
Front Matter
The Auk
Back Matter
The Auk