. Bird migration . ntinuously, could make intermediate stops if they so , when storm driven, they seek the nearest land and notmfrequently appear at Cape Cod and Long Island. Some flocks stopfor longer or shorter periods at Bermuda and on the islands of theLesser Antilles. To the golden plover of the Pacific, however, nosuch convenient harbors of safety are available. Their flight ofapproximately equal length (2,000 miles) takes them across an island-less sea from Alaska to Hawaii. No matter what storms are en-countered, when once they are started over the ocean they must con-
. Bird migration . ntinuously, could make intermediate stops if they so , when storm driven, they seek the nearest land and notmfrequently appear at Cape Cod and Long Island. Some flocks stopfor longer or shorter periods at Bermuda and on the islands of theLesser Antilles. To the golden plover of the Pacific, however, nosuch convenient harbors of safety are available. Their flight ofapproximately equal length (2,000 miles) takes them across an island-less sea from Alaska to Hawaii. No matter what storms are en-countered, when once they are started over the ocean they must con-tinue to the end or perish. It seems incredible that any birds canlay a course so straight as to attain these small islands in midocean,2,000 miles from the Aleutian Islands on the north, 2,000 miles from 76048°—BuU. 185—15 3 18 BULLETIN 185, U. S. DEPAETMEJTT OF AGKICULTUEE. California on the east, and 3,700 miles from Japan on the west. Andyet year after year golden plover in considerable numbers fly in fall. Fig. 7.—Breeding range and migration routes of Connecticut warbler (Oporornis agilis). Breedingin northern United States and southern Canada, it migrates east in fall to New England, then followsthe Atlantic coast to Florida and across the West Indies to the winter home in South America. Inspring after its return to Florida it crosses the Allegheny Mountains and passes up the Mississippi Valleyto its summer home. (Seep. 21.) from Alaska to Hawaii, spend the winter there, and the next springwing their way back again to nest in Alaska. BIRD IMIGRATION. 19 DIRECT AND CIRCUITOUS MIGRATION ROUTES. All black-poll warblers winter in South America. Those that areto nest in Alaska strike straight across the Carribbean Sea to Floridaand northwestward to the Mississippi River (see fig. 5). Then thedirection changes and a course is laid almost due north to northernMinnesota in order to avoid the treeless plains of North when the forests of the Saskatchewan are
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