Grace's Warbler
Common
Name: Grace's Warbler (GRWA)
Scientific
Name:
Dendroica
graciae
Global/Continental
Conservation Status: Not
on IUCN 2004 Red List
National-level
Conservation Status:
U.S.
– Bird of Conservation Concern
Key
Reference(s):
BNA No. 677 (Stacier and Guzy 2002)
Distribution:
Breeds from s Nevada, s Utah, sw Colorado, n New Mexico, and w
Texas (Guadalupe & Davis mountains) south through the mountains of w
Mexico (east to w Chihuahua, Durango, and w Zacatecas), Guatemala, El
Salvador, and Honduras to n-c Nicaragua; also in lowland pine savanna of
Belize, e Honduras, and ne Nicaraga. Summer
records from mountains of e and s
California
. Winters from
Sonora
and
Chihuahua
south through the breeding range (occurring east at least to n
Oaxaca
), being generally resident from c
Mexico
southward (AOU 1998).
Habitat
Associations:
Pine forest, Pine-Oak forest, lowland pine savannas (
Middle America
), locally spruce-fir forest in northern portions of range (600-2800 m;
Tropical to Temperate zones) (AOU 1998).
Source(s)
of Research/monitoring Needs: Nevada Bird Conservation
Plan; BNA No. 677 (Stacier and Guzy 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)
- Determine
population status for GRWA (
Nevada
)
- Highest
priority is for information on status, breeding biology, life history
and conservation of GRWA south of the
U.S.
border (BNA)
- Determine
reasons for twofold fluctuations in abundance from year to year (BNA)
Habitat
Needs/Ecology/Life History
- Information
on breeding phenology & behavior (timing & duration of nest
building, laying, incubation, and fledging periods, clutch & brood
size, diet) (BNA)
- How
does habitat influence reproductive success (including variation in
food abundance and weather) (BNA)
Effects
of Management Practices
- Effects
of logging, grazing, fire suppression and development (BNA)
Effects
of Human Development/Disturbance
- see
needs under “Effects of Management Practices”
Nest
Parasitism
- Effects
of cowbird parasitism on GRWA (BNA)
Migration
- Information
on routes & timing of migration (BNA)
Demographics
- Information
on reproductive or mortality rates (BNA)
[Link
to References]
[Link
to PIF Bird Conservation Plans]
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