. Useful birds and their protection. Containing brief descriptions of the more common and useful species of Massachusetts, with accounts of their food habits, and a chapter on the means of attracting and protecting birds . known to band togetherto hunt down and kill adultas large as the Kuffed (Tr( The well-known Blue Jay{Cyanocitta crista/a) is destructiveto the eofo-s of the smaller l)irds,whose nests it robs systematically,and it has frecjucntly been seen tokill the young. The Rol)in and otheilarger birds will drive the Jay away Fig. „ , . ^ lialf natural size. from their
. Useful birds and their protection. Containing brief descriptions of the more common and useful species of Massachusetts, with accounts of their food habits, and a chapter on the means of attracting and protecting birds . known to band togetherto hunt down and kill adultas large as the Kuffed (Tr( The well-known Blue Jay{Cyanocitta crista/a) is destructiveto the eofo-s of the smaller l)irds,whose nests it robs systematically,and it has frecjucntly been seen tokill the young. The Rol)in and otheilarger birds will drive the Jay away Fig. „ , . ^ lialf natural size. from their nests, but it often succeeds in robbing them by stealth. Vireos, Warblers, and Spar-rows it regards very little, and plunders their nests withoutnoticing their agonized cries. Jays and Crows toijethersometimes make it very difficult for other birds to raise anyyoung. It would not be advisal)le to exterminate the Crow,for it has many useful habits ; but it should not be allowedto increase at the expense of the smaller birds. Crows arevaluable as grasshopper killers, and they are destructive tothe gipsy moth. Jays eat the eggs of the tent caterpillarmoth, and the larvii? of the gipsy moth and other haiiy cater-. See The Crow in Massachusetts, Animal Report of tlie Massachusetts StateBoard of Agriculture, 1896, pp. 285-289; Two Years with the Birds on a Farm,P)id., 1902, pp. 147-149; and The Decrease of Certain Birds, IbuL. 1904, pp. 498-502. 370 USEFUL BIRDS. pillars. Mr. S. Waldo Bailej^ informs nie that Blue Jaystear open the winter webs of the brown-tail moth and eatthe young larvse. The House Sparrow. The House or Eng-lisli Sparrow (^Passer domesticus) isthe only one of the smaller birds that has repeatedly beenseen to destroy the nests of other birds, break their eggs,kill their 3oung, mob them, and drive them away fromtheir homes. It occupies the houses of Bluebirds, Martins,Swallows, and Wrens, and the nests of Barn Swallows,Cliff Swallows, and Bank Swallows, and, by pe
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