. Birds of California; an introduction to more than three hundred common birds of the state and adjacent islands, with a supplementary list of rare migrants, accidental visitants, and hypothetical subspecies . ggs: 1 to i ; pale greenish buffy, lightly spotted with shades of brown.Size 2.21 X 1.70. Throughout the interior valleys of California, Swain-sons Hawk is a common spring and summer visitant, not yet so well Pocket gophers, and grass- this dis- . is and one whose full valueknown as it should be.ground squirrels, insects,hoppers are its sole diet intrict, and no one can com-pute the bene
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. Birds of California; an introduction to more than three hundred common birds of the state and adjacent islands, with a supplementary list of rare migrants, accidental visitants, and hypothetical subspecies . ggs: 1 to i ; pale greenish buffy, lightly spotted with shades of brown.Size 2.21 X 1.70. Throughout the interior valleys of California, Swain-sons Hawk is a common spring and summer visitant, not yet so well Pocket gophers, and grass- this dis- . is and one whose full valueknown as it should be.ground squirrels, insects, hoppers are its sole diet intrict, and no one can com-pute the benefit that accruesto the farmer from the breed-ing of these hawks on or near .1 Itheir land. Par- ._^^^j^3/||/^_^*^ticularly is this ^ ~ S^^» * *true of a sandybarren soilwhere gopherburrows arenumerous. Dozens of thehawks fly down to the go-pher colony, just at dusk, and take up their stand atthe entrances of the bur-rows, where they wait patiently and silently until the preyappears. It never escapes them. If there are young hawksin the nest, the victim will be carried to them; if not, itwill usually be eaten at the perch nearest to the huntingground. In either case, back comes the hawk for a Ti^L -«^, . 342. Swainson Hawk.Wait silently until the prey appears. 152 LAND BIRDS second and a third course in surprisingly few minutes.Anyone who cares to watch will probably find that sixtygophers to each dozen hawks each day, besides countlessinsects and grasshoppers, is a fair estimate. Small birdsthey do not harm. If any proof of this were needed, thesong birds themselves furnish it every season by buildingtheir nests fearlessly in the same tree, and not seldomwithin ten inches of that of the hawk. Arkansas king-birds, shrikes, and bullock orioles have all been found, byCaptain Bendire, rearing their young close to the younghawks, and a veritably happy family they are. The hawks nest is large and slovenly, a mere platformof sticks, placed indiscriminately in a low bush or a talltree,