92 PACIFIC COAST AVIFAUNA No. 12 



On Santa Cruz, A. van Rossem and I met with numbers of these warblers 

 during April, 1911, and C. B. Linton (28) reported them very common there in 

 November and December, 1907. J. JNIailliard (16) says that tlie note of the birds 

 he heard was longer and sti'onger than that of lufcsccns, with two louder addi- 

 tional notes at the end of the trill. C. H. Townsend (9) mentions a specimen that 

 was secured on Santa Rosa, January 7, 1889, and 0. W. Howard (MS) says that 

 he has observed this form on San Miguel. 



On a small peninsula near Coronado Beach, known as the Spanish Bight, 

 and now the aviation camp, I noted many Dusky Warblers, and found three in- 

 complete nests April 6, 1910. A. M. IngersoU (MS) has also found nests at 

 Point Loma, nearby. It occurs in limited numbers on the islands during the 

 fall and winter, but the majority migrate to the mainland, where they may be 

 found in the lowlands from the Mexican line to Santa Barbara County. 



The usual nesting site of the Lutescent Warbler is on the ground, but T liave 

 never heard of sordida building in such a situation. On the smaller barren isl- 

 ands, such as the Coronados and Todos Santos (where it is common), they build 

 in a bush or tangle of vines, a foot or so above the ground, and the nest is always 

 mainly constructed of gray moss, where this is to be had, lined wnth a little fine 

 grass. On the larger islands, where there are good-sized trees, the site chosen 

 may be a thicket of vines several feet above the bed of a stream, a small shrub, 

 say four feet up, or perhaps an oak as much as fifteen feet above the ground. In 

 such case the nest is quite substantially made of leaves, twigs, bark, rootlets, and 

 often a little sheep wool. Three or four eggs constitute a set, and at least two 

 broods of young are raised each year. 



167. Dendroica coronata (Linnaeus) 



IMyrtle Warbler 



Dendroica coronata (1) Grinnell, Pasadena Acad. Sci., i, 1897, p. 7. (2) Linton, Condor, 



XI, 1909, p. 194. (3) Willett. Pac. Coast Avif., 7, 1912, p. 96. 

 Dendroica coronata hooveri (//) Grinnell, Pac. Coast Avif., 3, 1902, p. 64. (•>) Grinnell, 



Pac. Coast Avif., 11, 1915, p. 147. 



Uncommon winter visitant to the islands. C. B. Linton (2) recorded this 

 species as fairly common on San Clemente in the winter of 1908, and J. Grinnell 

 (1) shot an adult female on Santa Barbara Island, Maj^ 15, 1897, the only one 

 seen. 



168. Dendroica auduboni auduboni (J. K. Townsend) 



Audubon Warbler 



Dendroica auduboni (1) Grinnell, Pasadena Acad. Sci., i, 1897, p. 20. (2) Grinnell, Auk, 

 XV, 1898, p. 236. (.3) Mailliard, Bull. Cooper Orn. Club, i, 1899, p. 45. (.'/) Mearns, 

 Bull. U. S. Nat. Mus., lvi, 1907. p. 142. (.5) Richardson, Condor, x, 1908, p. 68. (6) 

 Linton, Condor, x, 1908, p. 86. (7) van Rossem, Condor, xi, 1909, p. 208. (S) How- 

 ell and van Rossem, Condor, xiii, 1911, p. 210. (.'/) Grinnell, Pac. Coast Avif., 11, 

 1915, p. 148. 



Audubon Warbler (W) Grinnell, Bull. Cooper Orn. Club, t, 1S99, p. 17. 



