Contents
A Study of Merriam's Temperature Laws
S. Charles Kendeigh
Life Zones, Modern Ecology, and the Failure of Temperature Summing
Victor E. Shelford
Notes from Central Iowa
Philip A. Dumont
Membership Roll
Wilson Bulletin
Covers
Back Matter (PDF)
Wilson Bulletin
Front Matter (PDF)
Wilson Bulletin
General Notes
A Late Date for the Chimney Swift in Indiana
Horace P. Cook
Two Iowa Duck Records
F. L. R. Roberts
Great Horned Owls Dying in the Wild from Diseases
Paul L. Errington
Recent Changes in South Dakota Bird Life
William Youngworth
Woodcocks and Wood Ducks in Washington County, Iowa
E. L. Breitenbach
The Swallow-tailed Kite in Pottawattamie County, Iowa
Myron H. Swenk
An Experiment with Nesting Purple Grackles
J. J. Murray
A New York Ring-necked Pheasant Census
R. G. Johnson
Cedar Waxwings Feeding on Ash Flower Stamens
A. E. Shirling
The Chipmunk as an Enemy of Birds
Grant Henderson
The Great Blue Heron Flops on Its Prey
Harold B. Wood
The Blue-gray Gnatcatcher Moves Its Nest
C. K. Lloyd
Some Corrections and Additions to the New A. O. U. Check-list
Harold H. Bailey
The Nesting Behavior of a Pair of Mockingbirds
Katie M. Roads
The Re-use of Nest Material
Edward R. Ford
An Encounter Between a Cooper's Hawk and a Horned Owl
Paul L. Errington