28 
number are of quite small size. Most of the species are arboreal, 
but a few are more or less terrestrial. The food is insects, picked 
from the leaves, branches, or bark of trees; occasionally caught 
in the air, flycatcher-like; sometimes picked up on the ground. 
Some species are good songsters, but the majority are rather poor 
singers. Most of our species migrate long distances. All the 
Warblers are beneficial birds and some species are particularly 
useful. 
272. CALAVERAS WARBLER. Vermivora ruficapilla 
gutteralis. 
Rather common migrants, principally through the mountains. 
273. LUTESCENT WARBLER. Vermivora celata lutescens. 
Abundant migrants throughout the county. 
274. DUSKY WARBLER. Vermivora celata sordida. 
Rather common winter residents along the seacoast. A few breed 
in thick brush within a mile or two of the sea. The summer home 
of this subspecies is the Coronado and Santa Barbara Islands and 
their migrations are very short for Warblers. 
275. ALASKA YELLOW WARBLER. Dendroica estiva 
rubiginosa. 
Infrequent migrants through the mountains. 
276. CALIFORNIA YELLOW WARBLER. Dendroica 
estiva brewsteri. 
Rather common summer residents in the foothills and moun- 
tains, and common migrants throughout the county. 
277. AUDUBON WARBLER. Dendroica auduboni. 
Abundant winter residents in the lower part of the county. 
Probably a few breed in the highest mountains. The food is 
insects, with a small proportion of weed seeds. Very beneficial 
because of the large proportion of injurious insects eaten. 
275. BLACK-THROATED GRAY WARBLER. 
Dendroica nigrescens. 
Common migrants through the mountains. 
279. TOWNSEND WARBLER. Dendroica townsendi. 
Rather common migrants through the mountains. 
280. ALASKA WATER THRUSH. 
Seiurus noveboracensis notabilis. 
Rare fall migrants. One has been taken at National City 
and another at San Diego. 
281. MACGILLIVRAY WARBLER. Oporornis tolmei. 
Rather common migrants, principally through the mountains. 
282. WESTERN YELLOWTHROAT. 
Geothlypis trichas occidentalis, 
Rather common migrants. 
288. TULE YELLOWTHROAT. Geothlypis trichas 
scirpicola. 
Rather common residents of tule marshes and wet places 
overgrown with weeds and brush. 
284. LONG-TAILED CHAT. Icteria virens longicauda. 
Rather common summer residents of willow thickets. 
