J. G.Keulemans lifch
P ig . 1 .T U R D U S AUjXUB OR I
„ .2. „ PJ2LLAS1,
H a a ih a rb imp.
TURDUS AUDUBONI, Baird,
AUDUBON'S THRUSH.
Merula silens (nec Vieill.), Swains. Phil. Mag. 1827, p. 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),
Turduspallasii, var. audubonii, Coues, Key N. Amer. B. 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, /3. auduboni, Ridgw. Orn. 40th Par. p. 394 (1877).
Turdus {Hylocichla) pallasi, c. auduboni, Coues, B. Color. Vail. p. 21 (1878).
Turdus aonalaschJcce auduboni, Ridgw. Proc. U.S. Nat. Mus. iii. p. 1 (1880); A. 0 . U.
Check-list N. Amer. B. 2nd ed. p. 319 (1895).
Hylocichla unalaschJcce auduboni, Ridgw. Proc. U.S. Nat. Mus. iii. p. 166 (1880).
Turdus p a lla si auduboni, Allen & Brewster, Bull. Nutt. Orn. Club, viii. p. 152 (1883).
Turdus seguoiensis, Belding, Proc. Calif. Acad. Sei. (2) ii. p. 79 {1889),
T, similis T. aonalaschkte, sed paullo major et magis olivascenti-brunneus: subalaribus, ut in T. pallasi, pallidis:
axillaribus cinerascentibus, hypochondriis concoloribus: cauda saturatiore brunnefi, vix castanea.
A udubon’s T hrush is intermediate in colour between T. aonalaschJcce and T. pallasi, and has an
intermediate geographical range. Mr. Ridgway (Man. 2nd ed. p. 576) gives its distribution
as fol io'wsRocky Mountains from the northern border of the United States south to the highlands
of Mexico and Guatemala.
In Montana, which appears to be the most northern breeding limit of the species, Mr. Williams
says that T. 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 11th 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 canon
of Snake River on the 9th of October (N. Amer. Fauna, no. 5, p. 108).
A 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), The same author states that it breeds in Colorado
from 50.00 feet to 11,500 feet (Auk, ii. p. 15). On 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,