1 i)4 ZOOLOGY— BIRDS. 



DENDROICA AUDUBONI, (Towns.). 

 tudiihon's "Warbler. 



Sylvia audiiboni, Towns., Jour. Acad. Nat. Sci. Phila., vii, ii, 1837, 100. 



Sylvicola audubonii, Woodh., Sitgreave's Exp. Zufii & Col. Riv., 1854, 71. 



Dendroica audubonii Bd., U. S. & Mex. Bound. Surv., ii, pt. ii, 1854, Birds, 10. — Id., Birds 

 N. A., 1S58, 273.— Xantus, Proc. Acad. Nat. Sci. Phila., 1S59, 191 (FortTejou, 

 Cal.).— Kennerly, P. R. R. Rep., Whipple's Route, x, 1859, 24.— Ueerm.. 

 P. R, R, Rep., x, pt. iv, 1S59, 39.— Coop. & Suckl., P. R, R. Rep., xii, pt. ii, 

 1800. 181.— IIayd., Trans. Am. Pbil. Soc, xii, 1802, 100.— Bd., Rev. Am- 

 Birds, i, 1805, 188.— CoUES, Proc. Acad. Nat. Sci. Phila., 1800, 09 (Fort 

 Tejon, Cal.).— Id., ib., 1S08, 83.— Cooper, Am. Nat., iii, 1809, 38.— Id., Proc. 

 Cal. Acad., 1S70, 75.— Id., Birds Cal., 1S70, 88.— Stev., U.-S. Geol. Surv. 

 Terr., 1870, 403.— Coues, Key N. A. Birds, 1872, 100.— Allen, Bull. Mus. 

 Comp. Zool., 1872, 175 (Colorado ; Utah). — Meeeiam, U. S. Geol. Surv. Terr., 

 1872, 075.— Bd., BREW., & Ridg., N. A. Birds, i, 1874, 229, pi. xiii, f. 1.— 

 Yarrow & Oensiiaw, Rep. Oru. Specs., 1S72, Wheeler's Exped., 1874, 10.— 

 Henshaw, Au. Lye. Nat. Hist. N. Y., xi, 1874, 4.— Id., An. List Birds Utah, 

 1872, Wheeler's Exped., 1874, 41.— Id., Rep. Orn. Specs., 1S73, Wheeler's 

 Exped., 1874, 58, 75, 102.— Coues, Birds Northwest, 1874, 5S. 



Dendroica audubonis (sic), Bd., Ives' Col. Exped., 1S57, pt. iv, 5. 



During the spring and fall migrations, this warbler is found in the Mid- 

 dle Region diffused over the country everywhere, from the pine region on 

 the mountains to the lowest valleys. Its habits and motions are identical 

 with those of the common Yellow-rump. Mr. Aiken has found it in 

 Middle Colorado as early as April 16, but it probably does not become 

 common till some time later. I saw it in small numbers about Denver 

 May 7, and numerous on the 10th, and apparently still moving northward 

 On visiting the mountains of Southern Colorado, I found this species was a 

 moderately common one in the pine region from about 9,000 feet upward. 

 By the 1st of June all were paired; and on the 3d I saw a female just begin- 

 ning a nest in the top of a small spruce, some thirty feet from the ground. 

 This was finished June 8, but no eggs had been laid, and I was forced to 

 content myself with the nest alone. Outwardly it was composed of strips 

 of bark firmly and neatly woven, and lined with fine grasses. It has an 

 external diameter of four inches and is one inch deep. 



Mr. Aiken speaks of this bird as follows : "Common as a summer resident 

 of Colorado, and during the migrations particularly abundant, spreading 

 over the whole country from the stunted pines at timber line to the deeidu- 



