GREEN HERON
201. Butorides virescens. 17 in.
Smallest of the family, except the Least Bittern. In breeding plumage, they are one of the most beautiful of herons. They may be found in marshes, along creeks or about the edges of shallow ponds or lakes. They are often seen sitting upon a partly submerged log sunning themselves, or waiting for a tempting frog or fish to pass within reach. When they are among rushes, they will usually attempt to escape observation by mimicking their surroundings, and they do so very successfully. When they are alarmed and take flight they utter a single sharp shriek. At other times they utter a series of hollow screams, “qu-ick, qu-ick,” and also a hollow croak.
Nest.—In bushes, in communities or in company with other species in the south, but usually a few pairs nest in a locality in the northern states and Canada. Eggs pale bluish-green (1.45 × 1.10).
Range.—Breeds from the Gulf to Manitoba and Nova Scotia; winters in the Gulf States.
BLACK-CROWNED NIGHT HERON
202. Nycticorax nycticorax nævius. 24 in.
Bill much heavier than that of the herons; neck and legs shorter and stouter; eye red; bill black; legs and bare space in front of eye, pale yellowish-green. Young birds are mottled with brownish-gray and white; eyes yellow. As their name implies, these herons do most of their feeding after dusk, sleeping during the greater part of the day. Their heronries are usually located in swamps, and preferably in coniferous trees. A visit to one of these is very interesting, but old clothes must be worn, for their homes are filthy. On your approach, the old birds flap away, and circle about with squawks of disapproval, and all the young birds commence a loud ticking noise, like what would be produced by hundreds of huge “grandfather’s clocks.”
Notes.—A harsh “quark.”