Contents
A Giant Flightless Bird from the Pleistocene of Florida
Pierce Brodkorb
Display Patterns of Tropical American Nine-primaried" Songbirds Iii the Green-backed Sparrow"
M. Moynihan
The Syrinx in Certain Tyrant Flycatchers
Mildred Miskimen
Experiments on Photoperiodic Regulation of the Testis Cycle in Two Species of the Thrush Genus Hylocichla
Ormsby Annan
Proceedings of the Eightieth Stated Meeting of the American Ornithologists' Union
Lawrence H. Walkinshaw
Recent Literature
The Auk
Notes and News
The Auk
Corrigendum
The Auk
General Notes
Data on the Body Temperature of Tropical Sea and Water Birds
Miklos D. F. Udvardy
A Proposed Subspecies of the Great Potoo, Nyctibius Grandis (gmelin)
Hugh C. Land and William L. Schultz
Record of the White Pelican and Additional Information on the Glossy Cowbird from Puerto Rico
Virgilio Biaggi Jr.
Observations of Joint Feeding Activities of Certain Fish-eating Birds
John M. Parks and Sandra L. Bressler
First Specimens of Ten Species of Birds for Mississippi
Lovett E. Williams Jr. and Sterling G. Clawson
European Siskin (carduelis Spinus) in Maine
Arthur C. Borror
Covers
Front Matter
The Auk
Back Matter
The Auk