. The birds of Illinois and Wisconsin . hardly noticeable. Length, to ; wing, to ; bill, to Franklins Gull must be considered a rare bird in Illinois. K. Worthen, of Warsaw, Illinois, writes, There is a beautifuladult male of this species mounted in the State Museum at Spring-field, which I took in May, 1875. It was flying over a pond in theMississippi bottom three miles below here. (Ridgway, Bull. Club, 1880, p. 32.) A rare visitant to Lake Michigan. (Nel-son, Birds N. E. 111., 1876, p. 146.) Not common but of regularoccurrence in the easter
. The birds of Illinois and Wisconsin . hardly noticeable. Length, to ; wing, to ; bill, to Franklins Gull must be considered a rare bird in Illinois. K. Worthen, of Warsaw, Illinois, writes, There is a beautifuladult male of this species mounted in the State Museum at Spring-field, which I took in May, 1875. It was flying over a pond in theMississippi bottom three miles below here. (Ridgway, Bull. Club, 1880, p. 32.) A rare visitant to Lake Michigan. (Nel-son, Birds N. E. 111., 1876, p. 146.) Not common but of regularoccurrence in the eastern part of the state as a fall migrant. * * *On Lake Michigan it is less common than anywhere in the interior.* * * It seems remarkable that so few spring specimens are obtainedin eastern Wisconsin. (Kumlien and Hollister, Birds of Wisconsin,1903, p. 10.) This species should be looked for along the Mississippi River, asit is a not uncommon summer resident and breeds in Minnesota. 296 Field Museum of Natural History — Zoology, Vol. Bonapartes Gull. Gull loses the black head in 20. Larus Philadelphia (Ord).Bonapartes : North America, breeding chiefly north of the United States;south in winter to the Gulf coast. Adult in summer: Bill, black; whole head, including throat, darksooty plumbeous; a white spot on the eyelids; back, pearl gray, shading into white at the base of theneck; under parts, white; feet, orangered; tail, white; first primary, white,with outer web and tip, black; secondprimary, white, tipped with black;rest of primaries with subterminalband of black tipped with white. Adult in winter: Similar, buthaving the head and throat white,and the crown and sides of the head winter. showing more or less gray. Immature: Upper plumage mixed with more or less gray and palebrown; under parts, white; tail with black band narrowly tipped withwhite. Length to 14; wing, about ; bill, about This species is abundant at times on Lake
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