. Les oiseaux de l'Illinois et du Wisconsin . 4.50; projet de loi, 30. La Barn Swallow est un résident d'été commun dans l'Illinois et le Wisconsin, de mai à septembre, se reproduisant dans les deux États. Le nid est en forme de cuvette, composé de boue et de paille et de plumes de linedwith. Il est généralement construit sur des chevrons de granges, ou lorsqu'il est à partir de bâtiments, attachés sur le côté ou dans les crevasses d'une falaise ou dans des grottes.par exemple, les£ sont de 3 à 5, blanc, repéré avec diverses nuances de brun et souvent lilas pâle, et mesure environ 0,78 x 0,54 pouces. Janvier 1909. Oiseaux de l'Illinois et du Wisconsin — Cory. 621 genre IRIDOPROCNE Coues. 285. Iridop

• Contributeur: Reading Room 2020 / Alamy Banque D'Images
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. The birds of Illinois and Wisconsin . 4.50; bill, .30. The Barn Swallow is a common summer resident in Illinois andWisconsin, from May until September, breeding throughout both states. The nest is cup-shaped, composed of mud .and straw and linedwith feathers. It is usually built on rafters of barns, or when awayfrom buildings, attached to side or in crevices of a cliff or in caves.The eg£;s are 3 to 5, white, spotted with various shades of brown andoften pale lilac, and measure about .78 x .54 inches. Jan., 1909. Birds of Illinois and Wisconsin — Cory. 621 Genus IRIDOPROCNE Coues. 285. Iridoprocne bicolor (Vieill.).Tree Swallow. White-bellied Swallow. Tachycineta bicolor (Vieill.), A. O. U. Check List, 1S95, P- 258. Distr.: Whole of North America, north to Ungava, Hudson Bay, and Alaska, sOuth in winter to Cuba and Central America; breedsfrom iVlabama and Texas northward throughout its range. Adult male: Upper plumage, glossy greenish blue or steel-blue, showing a greenish gloss when held in the light; under parts, white;. Tree S.vallow. wings and tail, blackish, with faint greenish gloss; tail, slightlyemarginate, the outer feathers being only ^ of an inch or less longerthan the middle feathers. In fall plumage the inner secondariesare edged and tipped wath white. Adult female: Similar, but duller. Young birds in first plumage on leaving the nest have the upperparts, including the wings and tail, slaty gray; under parts, wdiite, more or less washed w^ith ashy; feet, yellow. Length (adult), about 6; wing, 4.50 to 4.90; tail, 2.50; bill, .28. The Tree Swallow is a common summer resident throughoutIllinois and Wisconsin from the latter part of April until September.Late in August they congregate in large flocks preparatory to thesouthern migration. The nest is usually in hollow trees, but sometimes in buildingsor on the sides of a cliff. The eggs are from 4 to 6, pure white, andmeasure about .75 x .54 inches. 622 Field Museum of Natural History — Zoology, Vol. IX.

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