. Birds of a Maryland farm : a local study of economic ornithology . in the face of the river bluff. They were probably the prog-eny of the swallows that frequently circled over the farm. The foodof the nestlings and that of adults collected during the nesting seasonis shown in diagrams (PL IX, fig. 2). Purple martins, which came from a colony of somewhat more thana dozen pairs nesting in boxes on poles at Bryans Point, a mile abovethe house, were often seen circling about the farm. On June 28,1902,I visited the colony and found the parent birds feeding the young sol-dier bugs, ants, tig-eater
. Birds of a Maryland farm : a local study of economic ornithology . in the face of the river bluff. They were probably the prog-eny of the swallows that frequently circled over the farm. The foodof the nestlings and that of adults collected during the nesting seasonis shown in diagrams (PL IX, fig. 2). Purple martins, which came from a colony of somewhat more thana dozen pairs nesting in boxes on poles at Bryans Point, a mile abovethe house, were often seen circling about the farm. On June 28,1902,I visited the colony and found the parent birds feeding the young sol-dier bugs, ants, tig-eaters (Allorhinanitidd), and dragon-flies {Libelhdaand Agrionida?).. Fig. lfi.—Barn swallow. Three young downy woodpeckers which were collected May 28,1896, had fed principally on ants, but had also eaten spielers, groundbeetles, and caterpillars. Catbird.—The difference between the food of adults and youngbelonging to a highly frugivorous species is well illustrated in thecase of the catbird, and is shown in diagrams (PL IX, fig. 3), whichwere made principally from results obtained at Marshall Hall. Crow and Crow Blackbird.—Such granivorous birds as crows andcrow blackbirds feed their young mainly insects. Sufficient material 48 BIRDS OF A MARYLAND FARM. to illustrate this habit was not available at Marshall Hall, but thediagrams here given (figs. 17 and 18), based on results obtainedelsewhere/ will serve to show it. By the time the }Toung are readyto leave the nest, however, they are fed to a large extent on eithergrain or fruit, according to locality. In the Middle West they takegrain and in the East generally fruit. Both crows and crow black-
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbirds, bookyear1902
