. Gli uccelli dell'Illinois e del Wisconsin . 2.40; tarsus, 1.85; bill, 2.30. Il Green Heron è un comune estate residente in Illinois e Wis-in-stato del Wis-in e razze in entrambi gli stati in località adatte.la Nidificazione inizia nel mese di maggio. Il nido è una massa di piccoli twigspiazzati in un cespuglio o un albero basso vicino all'acqua. Le uova sono da 4 a 6, blu palebreo o verdolino, e misura 1.50 x 1.15 pollici. Un ammiraglio sull'allevamento di questa specie in Wisconsin è dato da Irene G. Wheelock in Auk, Vol.XXIII, 1906, pag. 432, a cui si riferiscono gli interessati. Genere NYCTICORAX Forster.88. Nycticorax

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. The birds of Illinois and Wisconsin . 2.40; tarsus, 1.85; bill, 2.30. The Green Heron is a common summer resident in Illinois and Wis-consin and breeds throughout both states in suitable localities.Nidification commences in May. The nest is a mass of small twigsplaced in a bush or low tree near water. The eggs are 4 to 6, paleblue or greenish blue, and measure 1.50 x 1.15 inches. An admirablearticle on the breeding of this species in Wisconsin is given by Mrs.Irene G. Wheelock in The Auk, Vol. XXIII, 1906, p. 432, to whichthose interested are referred. Genus NYCTICORAX Forster.88. Nycticorax nycticorax naevius (Bodd.).Black-crowned Night Heron. Local name: Quawk. Distr.: Whole of America, from Ontario and Manitoba south tothe West Indies and South America to the Falkland Islands. Adult: Crown, head, back, and scapulars, greenish black; fore-head, lores, most of the neck and under parts, white or ashy white;wings and tail, gray; legs and feet, yellow; two or three very longoccipital plumes, white in the breeding season. ^. Adult. Black-crowned Night Heron. Immature. Jan., 1909. Birds of Illinois and Wisconsin — Cory. 373 Length, 24 to 26; wing, 11; tarsus, 3.10 to 3.40; tail, 4.20 to 5.30. The immature bird has the general plumage mottled dark brownand gray, the feathers marked and streaked with pointed blotches ofgrayish or buff; outer web of primaries, buff color; under parts, streaked with black and white. A common summer resident in Illinois and Wisconsin, breeding incolonies, usually in trees but at times in swampy places among reeds.Nelson states he found them nesting in a dense growth of wild rice.The eggs are 4 or 5, sometimes 6 in number, pale blue, and measureabout 2 X 1.45 inches. It arrives from the south late in April andthe eggs are laid in May and early in June. Genus NYCTANASSA Stejneger. 89. Nyctanassa violacea (Linn.).Yellow-crowned Night Heron. Nyctirorax violaceus (Linn.), A. O. U. Check List, 1895, p. 74. Distr.. Tropical and subtropical Ameri

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