. Key to North American birds. Containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary, inclusive of Greenland and Lower California, with which are incorporated general ornithology: an outline of the structure and classification of birds; and field ornithology, a manual of collecting, preparing, and preserving birds . dingin a rounded outline on the base of the culmen, generally to the nostrils. Wings broad andample; the inner quills usually as long as the primaries, folding over them when the w
. Key to North American birds. Containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary, inclusive of Greenland and Lower California, with which are incorporated general ornithology: an outline of the structure and classification of birds; and field ornithology, a manual of collecting, preparing, and preserving birds . dingin a rounded outline on the base of the culmen, generally to the nostrils. Wings broad andample; the inner quills usually as long as the primaries, folding over them when the wing isclosed. Tail very short, of twelve (usually) or ten (in Zebrilus and Botaurinm) soft broadfeathers. Tibise naked below (except Zebrillus), sometimes for a great distance. TarsiBcutellate in front (except Tigrisoma), and sometimes behind, generally reticulate there andon the sides. Toes long and slender; the outer usually connected with the middle ))y a baaiilweb, the hinder very long (for wading birds), inserted on the level of the rest. Hind cla«-larger and more curved than the middle one (always?) ; the middle A&wpectinate. The group thus defined offers little variation in form; all the numerous genera now ABBEIB^: HERONS. 655 in vogue have been successively detached from Ardea, the typical one, vrith which manyof them should be reunited. The Night Herons (NycUa/rdea and Nycterodms) differ some-. Fig. 456, — Herons, idealized from Ardea cinerea. fFrom Miohelet.) what in shortness and especially stoutness of bill; vrhile the Bitterns (Botawrus and Ardetta),■the South American genera Tigrisoma, Zebrilus, and a few others, are stiU better marked. 656 SYSTEMATIC SYNOPSIS.—EEBOPIONES—HEBOBII. There are about seventy-five species, very generally distributed over the globe, but especiallyabounding in the torrid and temperate zones. Those that penetrate to cold countries insummer are regular migrants; the others are generally stationary. They are maritime,lacustrine an
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbirds, bookyear1896
