THE COMMON CROW BLACKBIRD. Tue Crow Blackbird, of which vast numbers visit our cornfields, is about ten inches in length. The prevailing black of the plumage is relieved by glossy re- flections of steel-blue and violet. The male is larger than the female. They arrive in the states north of Virginia, in April, and continue to increase in num- ber until they wholly overrun the warmer maritime regions. Wilson relates that he met with a prodigious army of Black- | birds on the banks of the Roanoke, in Virginia, which, as he approached, rose from the fields with a noise like thunder, (26)