California Thrasher
Common
Name:
California
Thrasher (CATH)
Scientific
Name:
Toxostoma
redivivum
Global/Continental
Conservation Status: Not on IUCN 2004 Red List
National-level
Conservation Status:
Nothing other than coverage under the Migratory Bird Treaty Act
Key
Reference(s):
BNA No. 323 (Cody 1998)
Distribution:
Resident in
California
north to Humboldt and Shasta counties (west of the Cascades-Sierra Nevada
and the deserts), and in nw
Baja California
(south to lat. 30º N) (AOU 1998).
Habitat
Associations:
Lowland and coastal chaparral, riparian woodland thickets, and
locally in suburbs with extensive shrubs (AOU 1998).
Source(s)
of Research/monitoring Needs: BNA No. 323 (Cody 1998);
PIF Monitoring Needs document (Partners in Flight Science Committee 2004)
PIF
Continental Plan Monitoring Needs Category:
Mo2
(BBS trends have very low precision)
RESEARCH/MONITORING NEEDS (source(s) of needs)
Monitoring
- Priority
monitoring action – Improve the Breeding Bird Survey (BBS) (PIF
Monitoring Needs doc)
- Second
priority monitoring action – Conduct early spring desert surveys (PIF
Monitoring Needs doc)
Habitat
Needs/Ecology/Life History
- A
thorough comprehensive breeding study of CATH with banded birds over
several seasons (schedule of egg-laying, feeding of young, multiple
broods?, maturation of juveniles, dispersal, pairing, 1st breeding
efforts) (BNA)
- See
needs under “Predation”
Predation
- In
a gradient from undisturbed to fragmented habitat, determine effects
of nest predators, variation among habitats, role of predators in
setting minimum areas for breeding CATH (BNA)
[Link
to References]
[Link
to PIF Bird Conservation Plans]
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