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UNIVERSITY OF CALIFORNIA-EXPERIMENT STATION 
Audobon Warbler ( Dendroica auduboni). —Above and below bluish slate 
streaked with black; white patches on wings and on outer tips of tail; a 
patch of yellow on top of head, throat, shoulders, and rump. Usually seen 
feeding in the foliage of trees or capturing insects in the air like a fly¬ 
catcher. A winter visitant; breeds in high mountains. Feeds entirely on 
insects. 
Western Mockingbird (Mimus polyglottos leucopterus) .—Above, gray; below, 
whitish; white patch on wings; two outer tail feathers white. Usually seen 
near citrus orchards, houses, or along arrovos. Permanently resident in 
southern California. Sings at night; eats insects, berries, and fruit. 
Western House Wren ( Troglodytes cicdon parkmani). — Above, brown, finely 
barred with blackish; tail held at angle to body, barred with gray and 
black; below, ashy brown. Usually seen about houses or buildings where 
it nests in holes, or in wooded areas where it nests in cavities. A summer 
visitant except in parts of southern California. Feeds entirely on insects. 
California Bush-tit ( Fsaltriparus minimus californicus) .—Small, gray bird 
with long tail and small bill. Usually seen in flocks (in winter) feeding in 
foliage; individuals of flock keep up constant chatter; builds long hanging 
nests. Permanently resident. Insects harmful to trees such as scale and 
caterpillars form the chief food. 
Wren Tit ( Chamaea fasciata ).—Brownish, long tail held wren-like. Usually 
seen in shrubs or bushes; the call a loud whistle on same pitch, with each 
succeeding note shorter, is often heard in brushy canons. Permanently 
resident. Feeds on insects. 
Western Robin ( Plancsticus migratorius propinquus). —Head blackish; back 
slaty; tail blackish; throat white; breast reddish brown; belly white. 
Usually seen on ground or in trees. Permanently resident in mountains but 
a winter visitant in the valleys. Earthworms, insects, berries, and fruit 
are eaten. 
Western Bluebird ( Sialia mcxicana occidentalis) .—Male, above bright blue; 
throat blue; breast and sides chestnut; belly white; female with gray 
largely replacing blue and chestnut, making coloration much duller. Usually 
seen in open fields, orchards, and wooded areas. Permanently resident. 
Food chiefly insects, many of which are injurious to crops. 
X. COMMON CALIFORNIA MAMMALS 
By PROFESSOR HAROLD C. BRYANT 
California Mole (Scapanus latimanus ).—About 6 inches long; short tail; 
brownish, glossed with silver; no visible ears; minute or rudimentary eyes; 
broad flattened front feet with strong claws. The workings, usually a ridge 
on the surface of the ground, but sometimes a mound of earth, far more 
often seen than the animal itself. The principal food is earthworms, larvae, 
and insects; so far as food is concerned the mole is a benefit but the animal 
often destroys garden truck and is destructive to lawns because of its habit 
of working about among the roots and allowing them to dry out. 
Pacific Pallid Bat (Antrozous pacificus ).—Bats are the only mammals with 
well-developed powers of flight. This bat is of large size (3 inches), large 
