Contents
The Larus Gulls of the Pacific Northwest's Interior, with Taxonomic Comments on Several Forms Part I
John W. Weber
Tool Use by a Mountain Chickadee
Philip Gaddis
Comment on Tool-using in Birds
Jeffery Boswall
Answer to Snap Judgment 6
Kenn Kaufman
Book Reviews
Elaine Cook
Recent Literature in Field Ornithology
Continental Birdlife
Latest Rumors
Continental Birdlife
Full Issue
Full Issue
Continental Birdlife
Cover
Front & Back Matter
Continental Birdlife