. Eine Verbreitungsliste der Vögel von Montana, mit Anmerkungen über die Migration und Nistung der besser bekannten Arten . t die westliche Hälfte des Staates. Verv reichlich auf Tiie Westseite der kontinentalen Kluft, wheie 166 PAZIFIKKÜSTE AVIFAUNA No. 14 ist es die eoiiDiionest Art ioimd an den Ufern des Flathead Lake. Züchtet in den Übergangszonen und kanadischen Zonen, in Nadelwäldern oder in den Wäldern von EonilVrsand Laubbäume gemischt. Tritt in der Migration im östlichen Teil des Staates, wo es regelmäßig, aber nicht häufig. Die östlichsten Aufzeichnungen seiner Zucht;irc aus dem P>elt-Gebirge (
1787 x 1397 px | 30,3 x 23,7 cm | 11,9 x 9,3 inches | 150dpi
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. A distributional list of the birds of Montana, with notes on the migration and nesting of the better known species . t the western halfof the state. Verv abundant on tiie west side of the continental divide, wheie 166 PACIFIC COAST AVIFAUNA No. 14 it is the eoiiDiionest species ioimd on the shores of Flathead Lake. Breeds in tinTransition and Canadian zones, in coniferous forests or in forests of eonilVrsand broad-leaf trees mixed. Occurs in migration in the eastern part of the state, where it is regular but not common. The easternmost records of its breeding;irc from the P>elt Mountains (Williams, ISDOh, p. 292), the mountains of FergusCounty (Sillovvay, 1903a, p. 69), and the Hig Horn Mountains (McChcsney, 1S79. p. 2:^84). The migrations take place in May and September. Dates of spring migra-tion in portions of the state where it does not breed are as follows: Custer Coun-ty, May 31, 1906 (Cameron, 1908a, p. 55) ; Miles City and vicinity, May 11 toJune 7, 1902, thirteen specimens (Hedges, coll. Univ. Montana). In regionswhere this species breeds it nrrivi-s nbout the middle of May. Three years at. Fig. 34. Nest and eggs of the Olive-b.cked Thrush. Yellow Bay, Flathead Lake; June 29, 1914. Great Falls, give an average of May 15, and tlie earliest Jlay 3, 1892; three yearsat Columliia Falls average May 19, the earliest JMay 17, 1896 (Cooke, 1907, p.122). In the Belt Mountains it is said to arrive May 10 (Williams, 1890b, p.292). Other dates are : Bozeman, June 1, 1909 ; Norton Gulch, Silver Bow Couu-t.v, May 16, 1910; Anaconda, May 14, 1911 ; Choteau, May 22, 1912; Teton River, lIay 28, 1915; and Button. May 27-June 4, 1916 (DuBois, MS). Fall migrationtakes place from September 1 to October 10 (Williams, 1890b, p. 294). The lat-est date at Columbia Falls is September 23, 1895 (Cooke, 1907, p. 124). Theonly other definite fall date I know of is from Sun River, September 4, 1912. Nesting begins about the middle of June, and eggs may be found from thenuntil the midd
