. Breeding birds of Ontario : nidiology and distribution. Birds; Birds; Birds. American Tree Sparrow, Spizella arborea (Wilson) Nidiology RECORDS 8 nests representing 1 provincial region. A nesting species of treeline and tundra (Figs. 147 and 149), only 8 nests of the American Tree Sparrow have been discovered in Ontario. Three of these were at the mouth of the Severn River, near the coast and at treeline; 2 were on the southeast shore of the Winisk River, km (1 mi) from the coast, on peat tundra; 3 were at the abandoned radar sites 415 and 416 near Cape Henrietta Maria, on tundra. All 8
. Breeding birds of Ontario : nidiology and distribution. Birds; Birds; Birds. American Tree Sparrow, Spizella arborea (Wilson) Nidiology RECORDS 8 nests representing 1 provincial region. A nesting species of treeline and tundra (Figs. 147 and 149), only 8 nests of the American Tree Sparrow have been discovered in Ontario. Three of these were at the mouth of the Severn River, near the coast and at treeline; 2 were on the southeast shore of the Winisk River, km (1 mi) from the coast, on peat tundra; 3 were at the abandoned radar sites 415 and 416 near Cape Henrietta Maria, on tundra. All 8 nests were on the ground: 2 at the bases of small black spruce; 4 at the bases of small deciduous shrubs (2 were arctic willow); 1 in grasses near willows; and 1 under a piece of partially buried scrap metal. Nests were well-hidden, sunken cups whose exteriors were of coarse grasses, twigs, plant stalks, mosses, and leaves. Linings were characteristically of feathers (Willow Ptarmigan and duck spp.) and fine grasses. The outside diameter of 1 nest was 13 cm ( inches); inside diameters of 2 nests were and cm ( and inches); outside depth of 1 nest was 7 cm ( inches); inside depths of 2 nests were 4 and 5 cm ( and 2 inches). EGGS 5 nests with 1 to 6 eggs; IE (IN), 4E (IN), 5E (IN), 6E (IN). Three other nests each contained 5 young. INCUBATION PERIOD No information. EGG DATES 5 nests, 21 June to 9 July (6 dates); 3 nests, 26 June to 1 July. Breeding Distribution The first 2 nests of the American Tree Sparrow reported in Ontario were not located until 1940 (Baillie, 1961), and only 6 subsequent nests have been found. It breeds at or above treeline all along the Hudson Bay coast. Although Manning (1952) noted these birds along most of the James Bay coast in early summer, there is no evidence that it nests farther south than the approximate limit of trees reaching the coast near Lake -V 207. Please note that these images are extracted from scanned page
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Keywords: ., bookcentury1900, bookdecade1, bookleafnumber221, booksubjectbirds
