. Handbook of birds of the western United States including the great plains, great basin, Pacific slope, and lower Rio Grande valley . wing 13, bill , tarsus 2. Remarks. — The young of the laughing gull may be distinguished fromFranklin and Bonaparte by its large size, longer bill, and wider black tailband. Distribution. — Atlantic and Gulf coast of United States and Pacificcoast of Mexico; south in winter to the Amazon. Recorded from Col-orado. Nest. — In trees, four to twenty feet from the ground, generally madeof small sticks, lined with hay and moss. 59. Larus franklinii Sw.^Rich. Fran
. Handbook of birds of the western United States including the great plains, great basin, Pacific slope, and lower Rio Grande valley . wing 13, bill , tarsus 2. Remarks. — The young of the laughing gull may be distinguished fromFranklin and Bonaparte by its large size, longer bill, and wider black tailband. Distribution. — Atlantic and Gulf coast of United States and Pacificcoast of Mexico; south in winter to the Amazon. Recorded from Col-orado. Nest. — In trees, four to twenty feet from the ground, generally madeof small sticks, lined with hay and moss. 59. Larus franklinii Sw.^Rich. Franklin Gull. Adults in summer. — Billbright red, with darker sub-terminal band ; head plum-beous black; eyelids white ;mantle dark slaty; quillsgray, tipped with white, thefive outer with subterrainalblack spaces; under parts ^white, deeply tinted with rosepink. Adults in winter: head [mainly white, with sides and ;back grayish dusky. Young : \top and sides of head andback grayish brown; quills , tipped with white ; tail iig. 4o. ^ All the black-headed gulls are flushed with pink in spring. ^^^Kmm 26 GULLS AND TERNS. Wing of Franklin 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; migrating 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 v^hitehorde will descend upon a ploughed field, a band of them followingat the heels of the ploughman, while long white lines cover themellow furrows. 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. T
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