{"fact":"Migrating American crows often fly along the shore of Lake Michigan, but avoid flying over the lake itself.","context":"All eight crows migrated either along Lake Michigan or within sight of the Lake (<5 km) without flying over it.","source":"Michael P. Ward; Arlo Raim, The fly-and-social foraging hypothesis for diurnal migration: why American crows migrate during the day, 10.1007/s00265-011-1151-0","index":121}