TURDUS AUDUBONI, Bard. 
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AUDUBON’S THRUSH. 
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Merula silens (nec Vieill.), Swains. Phil. Mag. 1827, р. 369. 
Turdus silens (nec Vieill.), Gray, Gen. B. i. p. 219 (1847). 
Turdus solitarius (nec Wilson), Scl. P. Z. S. 1857, p. 212. 
Turdus auduboni, Baird, Review N. Amer. B. p. 16 (1864) ; Seebohm, Cat. Birds Brit. Mus. 
v. p. 198 (1881). 
Turdus pallasii, var. audubonii, Coues, Key N. Amer. В. p. 72 (1872). 
Turdus pallasi (nec Cab.), Scl. & Salv. Nomencl. Av. Neotr. p. 1 (1873). 
Turdus pallasi, c. audubonii, Coues, B. N.-West, p. 3 (1874). 
Turdus guttatus, В. auduboni, Ridgw. Orn. 40th Par. p. 394 (1877). 
Turdus (Hylocichla) pallasi, с. auduboni, Coues, B. Color. Vall. p. 21 (1878). 
Turdus aonalaschke auduboni, Ridgw. Proc. U.S. Nat. Mus. iii. p. 1 (1880); A. O. U. 
Check-list N. Amer. B. 2nd ed. p. 319 (1895). | 
Hylocichla unalaschke auduboni, Ridgw. Proc. U.S. Nat. Mus. iii. p. 166 (1880). 
Turdus pallasi auduboni, Allen & Brewster, Bull. Nutt. Orn. Club, viii. p. 152 (1883). 
Turdus sequoiensis, Belding, Proc. Calif. Acad. Sci. (2) ii. p. 79 (1889). 
Be Sue: A E AE EA CAS 
T. similis T. aonalaschke, sed paullo major et magis olivascenti-brunneus: subalaribus, ut in T. pallasi, pallidis : 
. . . . m : BEN A 2 А 
axillaribus cinerascentibus, hypochondriis concoloribus: сапай saturatioré brunneä, vix castancá, 
AUDUBON's THRUSH is intermediate in colour between 7. aonalaschke and T. pallasi, and has an 
intermediate geographical range. Mr. Ridgway (Man. 2nd ed. p. 576) gives its distribution 
as follows :—Rocky Mountains from the northern border of the United States south to the highlands 
of Mexico and Guatemala. | 
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In Montana, which appears to be the most northern breeding limit of the species, Mr. Williams 
says that 7. auduboni is much the rarest Thrush, nesting from 4000 to 6000 feet (Auk, vii. p. 292). 
Messrs. Richmond and Knowlton obtained an adult bird on the llth of September at 8500 feet, 
and a young one in nestling plumage at Mystic Lake on the 27th of July (Auk, xi. p. 308). In 
South Central Idaho, Dr. C. Hart Merriam says that it was not found common anywhere. A few 
were seen in the spruce-forests of the Salmon River Mountains in August, and in the large сайоп 
of Snake River on the 9th of October (N. Amer. Fauna, no. 5, p. 108). 
А specimen from Fort Bridger, Wyoming, obtained by Mr. Drexler on the 6th of May, 1858, 
is in the Henshaw Collection. In Colorado, Mr. Minot found the species abundant at Boulder 
on the 31st of May (Bull. Nutt. Orn. Club, v. p. 224). At Pueblo Mr. Beckham noticed it from 
the 5th to the 13th of October, but saw it at no other time (Auk, iv. p. 124). In San Juan County 
Mr. Drew says that it was common and breeds in June, but was not noticed after the 13th of 
September (Bull. Nutt. Orn. Club, vi. p. 86). Тһе same author states that it breeds in Colorado 
from 5000 feet to 11,500 feet (Auk, ii. p. 15) Оп the Wet Mountains, in the same State, 
Mr. Lowe says that it is tolerably common, nesting up to 10,000 feet (Auk, xi. p. 270). 
In Arizona Mr. Scott found it not common, but he believed it to be the resident form, 
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