Samuels claims to have seen a pair of crows visit an orchard and destroy the young in two robins' nests in half an hour. He calculates that two crows kill, in one day alone, young birds that in the course of the season would have eaten a hundred thousand insects. When, in addition to these atrocities, we remember the crow's depredations in the corn-field, it is small wonder that among the first laws enacted in New York State was one offering a reward for its head. But the more scientific agriculturists now concede that the crow is the farmer's true friend.
_Length_--14 to 16 inches. About half as large again as the robin.
_Male and Female_--Glossy black, with purplish-blue reflections, generally greener underneath. Chin naked.
_Range_--Along Atlantic coast and that of the Gulf of Mexico, northward to southern New England. Rare stragglers on the Pacific coast.
_Migrations_--March or April. September. Summer resident only at northern limit of range. Is found in Hudson River valley about half-way to Albany.
Compared with the common crow, with which it is often confounded, the fish crow is of much smaller, more slender build. Thus its flight is less labored and more like a gull's, whose habit of catching fish that may be swimming near the surface of the water it sometimes adopts. Both Audubon and Wilson, who first made this species known, record its habit of snatching food as it flies over the southern waters--a rare practice at the north. Its plumage, too, differs slightly from the common crow's in being a richer black everywhere, and particularly underneath, where the "corn thief" is dull. But it is the difference between the two crows' call-note that we chiefly depend upon to distinguish these confusing cousins. To say that the fish crow says _car-r-r_ instead of a loud, clear _caw_, means little until we have had an opportunity to compare its hoarse, cracked voice with the other bird's familiar call.
From the farmer's point of view, there is still another distinction: the fish crow lets his crops alone. It contents itself with picking up refuse on the shores of the sea or rivers not far inland; haunting the neighborhood of fishermen's huts for the small fish discarded when the seines are drawn, and treading out with its toes the shell-fish hidden in the sand at low tide. When we see it in the fields it is usually intent upon catching field-mice, grubs, and worms, with which it often varies its fish diet. It is, however, the worst nest robber we have; it probably destroys ten times as many eggs and young birds as its larger cousin.
