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Field
Guide IDs: BREEDING:
Montane thickets
and shrubs, dwarf conifs, brushy canyons. 1?
brood. DISPLAYS:
? NEST:
Usu sunk in ground
at base of small tree or on horizontal branch of
low tree; bulky, of grass, leaves, twigs, bark,
moss, lined with fine grass, feathers,
fur. EGGS:
Creamy or pale
bluish-white, marked with reddish-browns. 0.9" (23
mm). DIET:
Nestlings probably
fed 100% insects. In winter, buds, flowers, fresh
seedlings (esp of annuals), seeds. CONSERVATION:
Winters s to n
Baja. NOTES:
Male feeds
incubating female. Details of breeding biology
largely unknown. Stable winter flocks, often with
White-crowned Sparrows, show site attachment to
wintering territory. Common migrant and
winter resident virtually throughout campus,
occurring in a variety of habitat types but usually
found in close proximity to the cover of brushy
vegetation. Often occurs in flocks with
White-crowned Sparrows, although more closely tied
to shrubs and brushy vegetation, and less often to
occur in tall grasses and forbs away from brush,
than is the White-crowned. Forages primarily on or
near the ground, although in spring flocks forage
in the crowns of flowering oaks and
eucalyptus. ESSAYS: Adaptations
for Flight;
Site
Tenacity;
Mixed-Species
Flocking;
How
Do We Find Out About Bird Biology? REFERENCES:
Pearson,
1979. |
