. Bulletin of the Department of Agriculture. Agriculture; Agriculture. DEPARTMENT BULLETIN No. 1249. Washington, D. C. October 27,1924 FOOD HABITS OF SOME WINTER BIRD VISITANTS. By Ira N. Gabrielson, Assistant Biologist, Division of Economic Investigations, Bureau of Biological CONTENTS. Introduction 1 Evening grosbeak 3 Pine grosbeak 5 Red crossbill 9 White-winged crossbill 12 Hoary redpoll 14 Common redpoll 15 Pine siskin 16 Page. Snow bunting 18 Lapland longspur 22 Smith longspur 25 Chestnut-collared longspur 26 McCowan longspur 27 Common pipit 27 Sprague pipit! 32 INTRODUCTIO
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. DEPARTMENT BULLETIN No. 1249. Washington, D. C. October 27,1924 FOOD HABITS OF SOME WINTER BIRD VISITANTS. By Ira N. Gabrielson, Assistant Biologist, Division of Economic Investigations, Bureau of Biological CONTENTS. Introduction 1 Evening grosbeak 3 Pine grosbeak 5 Red crossbill 9 White-winged crossbill 12 Hoary redpoll 14 Common redpoll 15 Pine siskin 16 Page. Snow bunting 18 Lapland longspur 22 Smith longspur 25 Chestnut-collared longspur 26 McCowan longspur 27 Common pipit 27 Sprague pipit! 32 INTRODUCTION. Every year as winter approaches the majority of the birds that have been present during the summer disappear and their places are taken by other species from the north. With few exceptions these winter visitors have nested either in the mountains or in the northern regions. Some of them are rare, and nearly all are known to the people of the United States only as " winter ; These birds tend to be erratic in their movements, being present in a locality in large numbers one season and then perhaps wholly absent for several succeeding years. The crossbills and grosbeaks, which feed to a great extent on seeds of various conifers, are the most erratic, not only in their winter migrations but in the time of breeding as well. Our winter bird visitants have inter- esting habits and behavior, and as they appear when most other birds are scarce they are especially welcome. Of the species treated in this bulletin,1 the pine and evening gros- beaks, redpolls, crossbills, and pine siskins are primarily birds of the a Prepared by the author when a member of the present Division of Food Habits Research. 1 The species treated in this bulletin include several winter bird visitants the food habits of which have not already been published. Numerous species of the sparrow tribe, for instance, besides those here included, are characteristic winter visitors, but their food hab
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