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April 1998, Vol. 26, No. 2 The Purple Martin in Massachusetts David E. Clapp Notes on a Wintering Mixed Sparrow Flock Matthew L. Pelikan Book Review: A Field Guide To Warblers of North America, by Jon L. Dunn and Kimball L. Garrett Mark Lynch Field Notes From Here and There Cooperatively Hunting Great Horned Owls James MacDougall Tag-team Screech-Owls Scott Cronenweth Bird Sightings: November/December 1996 Summary Christmas Bird Counts 1996 Compiled by Marjorie W. Rines and Robert H. Stymeist About The Cover: Cattle Egret W. E. Davis, Jr. At A Glance Wayne R. Petersen Cover Illustration: Cattle Egret by Richard Salvucci ^ top