285. ALASKA PILEOLATED WARBLER. 
Wilsonia pusilla pileolata. 
Rather common migrants. 
286. GOLDEN PILEOLATED WARBLER. 
Wilsonia pileolata chryseola. 
Common migrants. Breeds in small numbers in oak forests 
and in willow groves. 
Family MOTACILLIDA. Wagtails. 
A rather large family, principally European and Asiatic. Ter- 
restrial, insectivorous, migratory and more or less gregarious. 
Most of the species have the habit of wagging their tails up and 
down as if balancing on uncertain footing. 
987. AMERICAN PIPIT. TITLARK. Anthus rubescens. 
Common winter residents from the seacoast to the foothills. 
Family CINCLIDAS. Dippers. 
This is a small family of birds of peculiar habits for birds of 
this order, (Passeres) being exceptionally expert divers and obtain- 
ing their food under water. The family occurs in mountainous 
regions in northern Europe, northern Asia, western North America 
and western South America. They live along mountain streams 
and feed on aquatic insects and fish spawn. Their feet are not 
webbed but they fly through the water much as in flight in air. 
The food is picked from the gravel and stones in the beds of the 
streams. 
238. AMERICAN DIPPER. WATER OUZEL. Cinclus 
mexicanus unicolor. 
Rather rare migrants through the mountains or casual winter 
visitors. The lack of suitable permanent streams prevents the 
residence of this species in this country. They are more or less 
common in the mountain strearns further north in this state. 
Family MIMIDAS. Mockers and Thrashers. 
A moderate sized family peculiar to America. They are med- 
ium sized or rather small birds. Nearly all the species are fine 
songsters. Several species are excellent mimics of the songs of 
other birds. The food is insects and fruits. 
289. SAGE THRASHER. MOUNTAIN MOCKINGBIRD. 
Oroscoptes montanus. 
Infrequent migrants through the coast region, but more com- 
mon migrants in the eastern part of the county. Casual winter 
residents in the coast region. 
290. WESTERN MOCKINGBIRD. Mimus polyglottos 
leucopterus. 
Common residents from the seacoast to the foothills. Oc- 
easional in the lower mountains. Partial to orchards, parks and 
the suburbs of towns. The food is insects, berries and seeds 
They are fond of blackberries and figs, and are sometimes trouble- 
some where these fruits are ripening. They eat weed seeds, elder- 
