Contents
The Status of Avian Systematics and Its Unsolved Problems
Erwin Stresemann
Life History of the Groove-billed Ani
Alexander F. Skutch
Miscellaneous Items
The Auk
On the Breeding Distribution Pattern of North American Migrant Birds
Robert H. Mac Arthur
Hybridization in the Rufous-sided Towhees of the Great Plains
Charles G. Sibley and David A. West
Head-scratching Movements in Birds
Margaret M. Nice and W. E. Schantz
Differential Responses of Male Ovenbirds to Recorded Songs of Neighboring and More Distant Individuals
Judith Stenger Weeden and J. Bruce Falls
Recent Literature
The Auk
General Notes
Earlier Photographic Records of the Common Crane (grus Grus) for North America--in Alberta, Canada
William Wishart and Fred Sharp
Cattle Egret in Haiti
Oscar T. Owre
The Wing Molt and Systematic Position of the Genus Gampsonyx
Vesta Stresemann
Reverse Mounting in Red-bellied Woodpeckers
Doris C. Hauser
Leaf Pulling by the Purple Martin
Gilbert S. Raynor
Sprague's Pipit and Smith's Longspur in Ohio
Jay M. Sheppard
Occurrence of Pink Coloration in Adult Female Purple Finches
John H. Kennard and M. D.
Another Collection from Zacatecas, Mexico
J. Dan Webster
Cowbird Parasitizes Nest Containing Young
Russell E. Mumford
Living Nematodes Within Hen's Eggs
Kenneth C. Parkes
Covers
Front Matter
The Auk
Back Matter
The Auk