Wrentit
Common
Name: Wrentit (WREN)
Scientific
Name:
Chamaea
fasciata
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. 654 (Geupel and Ballard 2002)
Distribution:
Resident in coastal regions from nw
Oregon
south to nw
Baja California
(south to lat. 30º N), and in interior regions of n and c
California
(AOU 1998).
Habitat
Associations:
Chaparral, coastal sage scrub, and brushy areas, primarily in
lowlands; locally in suburbs with dense shrub layer (AOU 1998).
Source(s)
of Research/monitoring Needs: Oregon/Washington Bird
Conservation Plan (in Westside Lowlands & Valleys); California Bird
Conservation Plan; BNA No. 654 (Geupel and Ballard 2002); PIF Monitoring
Needs document (Partners in Flight Science Committee 2004)
PIF
Continental Plan Monitoring Needs Category: ** (Long-term population
trend monitoring considered adequate, but some issues (e.g., bias) may not
be accounted for)
RESEARCH/MONITORING NEEDS (source(s) of needs)
Monitoring
- Priority
monitoring action – NOTE: Breeding
Bird Survey (BBS) provides acceptable data at the continental level (PIF
Monitoring Needs doc)
- Second
priority monitoring action – Improve the BBS (PIF Monitoring Needs
doc)
- Third
priority monitoring action – Conduct new winter surveys (PIF
Monitoring Needs doc)
- Information
on Wrentit population trends for Sierra Nevada, southern grasslands,
&
Los Angeles
ranges (
California
)
Habitat
Needs/Ecology/Life History
- More
Information on Wrentit Habitat Requirements - Effects of understories dominated by native
vs. exotic species for priority species including WREN
(Oregon/Washington); Determine the most suitable ratio of cover types
for priority species including WREN (Oregon/Washington); Information
on specific habitat characteristics that promote higher density
populations (California); Identify the territory size and habitat
features that determine occupancy for priority species including WREN
(Oregon/Washington)
- Study
nesting ecology and habitat relationships of WREN (Oregon/Washington)
- Other
Information on WREN Life History - Evaluate life history traits for heretability (BNA); Determine
factors affecting different molt strategies in Hatch Year WRENs (BNA);
Function of song variation & other aspects of vocal repertoire
(BNA)
Effects
of Human Development/Disturbance
- see
needs under "Landscape"
Landscape
- Information
on Effects of Fragmentation on WREN - Information on mechanisms by which landscape
fragmentation & urban proximity affect WREN populations (
California
); Information on associations between WREN population viability and
landscape parameters (connectivity & patch size) (BNA)
Predation
- Identify
predators of WREN adults & nests; determine nest predation rates
(especially in the Central Valley of California)(BNA)
Nest
Parasitism
- Determine
nest parasitism rates (especially in the Central Valley of California)
(BNA)
Genetics/Taxonomy/Systematics
- More
information on genetics & taxonomy in WREN (BNA)
[Link
to References]
[Link
to PIF Bird Conservation Plans]
|
