Partridges, woodcock, snipe, &c., are among the game-birds; but all kinds of small birds are also shot for food, and their number is thus kept down, while many members of the migratory species are caught by traps in the foothills on the south side of the Alps, especially near the Lake of Como, on their passage.
The mammals of the Mountain Region include the cotton-tail rabbit, red squirrel, lynx and woodchuck; and there is a considerable variety of migratory song-birds, which are common to the more northern states.
The most destructive locust is the migratory locust (Locusta migratoria), which causes wholesale destruction in the East.
The commonest and most widely distributed migratory locust is Pachytylus cinerascens.
Northern Alberta and the region farther north is the nesting-ground of the migratory birds.