. Birds in their relations to man; a manual of economic ornithology for the United States and Canada . AN APHID, MAnNIFIFD ITS K(;(;S lUDS. third generatioi]. All of these early broods are Avhat arecalled parthenogenetic females, giving birth to living youngwithout the presence of any males. Many of these plant-liceare provided with wings, but the majority are wingless. Thisprocess of reproduction is conthiued througliout the w^arm season, but on the ap-])roach of cold weathera true sexual genera-tion is produced, themales of which may l)ecillicr winged or wing-less, while the femalesar
. Birds in their relations to man; a manual of economic ornithology for the United States and Canada . AN APHID, MAnNIFIFD ITS K(;(;S lUDS. third generatioi]. All of these early broods are Avhat arecalled parthenogenetic females, giving birth to living youngwithout the presence of any males. Many of these plant-liceare provided with wings, but the majority are wingless. Thisprocess of reproduction is conthiued througliout the w^arm season, but on the ap-])roach of cold weathera true sexual genera-tion is produced, themales of which may l)ecillicr winged or wing-less, while the femalesare always union of these twoforms the true are produced : theeggs are generally (lej)osited ujjoii the l)ranclies of trees orother plants; they pass through the winter and in springhatch into stem-mothers which renew the cycle of of tiie smaller birds, such as the warblers, nut-liatches, kinglets, and chickadees, appear to feed largely uponaphides and their eggs. These insects are only rarely foundin tlie stomachs of larger birds, like the robin, cat-bird, an
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbirds, bookyear1916
