Contents
The Breeding Biology of Smith's Longspur
Joseph R. Jehl Jr.
Agonistic Interactions Between Blue-winged and Brewster's Warblers
Andrew J. Meyerriecks and James Baird
Courtship of Blue-winged Warblers, Golden-winged Warblers, and Their Hybrids
Millicent S. Ficken and Robert W. Ficken
Distributional Changes and Interaction Between Prairie Chickens and Sharp-tailed Grouse in the Midwest
Paul A. Johnsgard and Robert E. Wood
Notes on Some Argentine Anatids
Milton W. Weller
Complex Interactions Between Clapper Rails and Laughing Gulls
Amelia Segre, Jack P. Hailman, and C. G. Beer
The Use of Tools by Brown-headed Nuthatches
Douglass H. Morse
A Comparison of Migration Between Blackbirds and Starlings
Don P. Fankhauser
Ornithological News
Wilson Bulletin
Ornithological Literature
Wilson Bulletin
Publication Notes and Notices
Wilson Bulletin
Covers
Back Matter (PDF)
Wilson Bulletin
Front Matter (PDF)
Wilson Bulletin
General Notes
Mottled Ducks in Kansas
Merril G. Mchenry
Chuck-will's-widow and Wood Ibis in Central Illinois
T. E. Musselman
Foraging Dives by Surface-feeding Ducks
Janet Kear and Paul A. Johnsgard
Records of the Snowy Owl for Utah
William H. Behle
Breeding Range Extension of Saw-whet Owl in West Virginia
Ralph M. Edeburn
Budgerigar Winters in the Open in Michigan
Walter P. Nickell
An Unusual Nesting Situation of the Tree Swallow
Allen H. Benton
Further Observations on Foster-feeding by Purple Martins
William E. Southern
Yellow-green Vireo Collected in Texas
Eugene Eisenmann, James I. Richardson, and George I. Child
A Slate-colored Junco Display
Hervey Brackbill
Yellow-headed Blackbird Nesting in Southern Ontario
Mark Sawyer and M. I. Dyer