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April 1990, Vol. 18, No. 2 Prairie Birding Through New England Eyes John C. Young The Double Edge Effect John C. Kricher Do Vagrant Birds In Massachusetts Reflect Population Growth and Dispersal Rather than Weather Patterns? Richard R. Veit Peregrine Day - Close Enough Peter Trall Herring Gulls Nest On Slanting Roof William E. Davis, Jr. Book Views Brian E. Cassie Ash-Throated Flycatcher: First For The Vineyard George Daniels Field Records: November/December 1989 Christmas Bird Count, 12/16/89-1/3/90 Robert H. Stymeist About The Cover: Middle Yellowlegs, Least Yellowlegs Ben L. Sill, Cathryn P. Sill, and John C. Sill Meet Our Cover Artist: John C. Sill Dorothy R. Arvidson At a Glance Simon Perkins ^ top