. Handbook of birds of the western United States, including the great plains, great basin, Pacific slope, and lower Rio Grande valley . 26 GULLS AND TERNS. Fig. 44. Wing of Frauklin Gull. with subterminal band of dusky; rest oftail, under parts, forehead, and eyelidswhite. Length : , wing ,bill , tarsus Distribution. — Interior of NorthAmerica, breeding from Iowa north intoCanada; mig-rating- south to Peru. Nest. — On broken-down rushes in shal-low water, made largely of grasses andrushes. Eggs: usually 3. In the northern plains and prairie country Franklin gulls are
. Handbook of birds of the western United States, including the great plains, great basin, Pacific slope, and lower Rio Grande valley . 26 GULLS AND TERNS. Fig. 44. Wing of Frauklin Gull. with subterminal band of dusky; rest oftail, under parts, forehead, and eyelidswhite. Length : , wing ,bill , tarsus Distribution. — Interior of NorthAmerica, breeding from Iowa north intoCanada; mig-rating- south to Peru. Nest. — On broken-down rushes in shal-low water, made largely of grasses andrushes. Eggs: usually 3. In the northern plains and prairie country Franklin gulls are ofthe greatest economic importance, the immense flocks living mainlyon grasshoppers and other destructive insects. At times a whitehorde will descend upon a ploughed field, a band of them followingat the heels of the ploughman, while long white lines cover themellow furrow^s. Recognizing the ploughman as a friend, the birdsonly get out of his way to let him pass, waiting for him to turn upa fresh supply of food for them. In Utah their services are so wellappreciated that Brigham Young used to offer up prayers that theybe sent to destroy the gras
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