. Birds in their relations to man; a manual of economic ornithology for the United States and Canada . s would busy itself if left undis-turbed no one can doubt. It would eat grass and clover, andcorn and cabbage, inflicting an immense injury itself, andleaving a progeny which would multiply that injury indefi-nitely. The bluebird is easily encouraged on the home groundsand will well repay a little trouble in furnishing nesting breeds readily in boxes and bird-houses, and if these areprovided in abundance it seems likely that the numbers ofthe birds may be materially increased. THE TH
. Birds in their relations to man; a manual of economic ornithology for the United States and Canada . s would busy itself if left undis-turbed no one can doubt. It would eat grass and clover, andcorn and cabbage, inflicting an immense injury itself, andleaving a progeny which would multiply that injury indefi-nitely. The bluebird is easily encouraged on the home groundsand will well repay a little trouble in furnishing nesting breeds readily in boxes and bird-houses, and if these areprovided in abundance it seems likely that the numbers ofthe birds may be materially increased. THE THRUSHES AND THEIR ALLIES. 89 THE ROBIN. With the exception of the English sparrow and possiblythe crow, the economic status of no American bird has beendiscussed so fully and freely as that of the robin. Appear-ing early in spring and remaining late in autumn in regionswhere it does not reside throughout the year, commonly fre-quenting lawns and meadows, building conspicuous nestsnear the haunts of man, feeding freely upon the fruits of thegarden and orchard, greeting the rising and the setting sun. ^PTP^-T-TL_ THE ROBIN.{After Biological Survey.) with bursts of no mean melody,—these and other consider-ations have combined to render the robin familiar to everylover of the out-door world. The robin obtains most of its insect food upon the ground,where it searches diligently for cutworms, white grubs,ground-beetles, and allied creatures. One of the mostfamiliar sights of spring in the Northern States is that ofdozens of robins searching the grass of lawns and meadowsfor food. These birds are decidedly gregarious, migrating inflocks of considerable size and remaining together in the 90 BIRDS IN THEIR RELATIONS TO MAN. South during winter. Even during the breeding season theyoung birds and the old males gather nightly to roost in cer-tain The nest is so well known that we need here only mentionits bulky size and the fact that at least two broods of four orfive young each a
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