Black-throated Gray Warbler (Setophaga nigrescens)

Black-throated Gray Warbler (Setophaga nigrescens)

About Black-throated Gray Warbler (Setophaga nigrescens)

Kingdom: Animals
Phylum: Chordates
Class: Birds
Order: Perching Birds
Family: New World Warblers

Comments: May have a potentially high risk of local extinction due to a low frequency of occurrence, low abundance, long-distance migration, and loss of late-successional coniferous forests (Lehmkuhl and Ruggiero 1991). TIMBER HARVEST: Impacts of the broad range of timber harvest activities are mostly unknown. GRAZING: Grazing impacts largely unknown. Grazing in riparian vegetation along Sacramento River valley may threaten wintering populations in California (USDA Forest Service 1994), presumably by damaging or removing shrubs and saplings. PREDATION: Accipiters prey on adults; jays, crows and snakes prey on eggs and young (Guzy and Lowther 1997). BROOD PARASITISM: Considered a rare brown-headed cowbird (MOLOTHRUS ATER) host (Ehrlich et al. 1988), but little studied. Total of 20 records known; parasitism rates in very limited samples in California, Arizona, and New Mexico were 10 percent to 20 percent (see Guzy and Lowther 1997). In white Mountains, California, two nests were observed that had nest layers built over a cowbird egg, but no other antiparasitic responses have been recorded (Guzy and Lowther 1997).

NatureServe

Lifelists

Trips

Visits

2007-04-09

Anza-Borrego Desert State Park, United States of America
2008-01-10

Tepic - Cerro de San Juan, Mexico
2008-12-12

Ferry Plaza, United States of America
2008-12-22

Bernal Hill, United States of America

In a mixed flock on the steps at Bessie Stairs
2010-02-21

Taxco, Mexico
2011-11-19

Ferry Plaza, United States of America
2012-09-19

Golden Gate Park - North Lake, United States of America
2013-09-13

Fort Mason, United States of America
2014-05-09

Cave Creek Canyon--Southwestern Research Station, United States of America
2014-05-10

Cave Creek Canyon--South Fork, United States of America
2014-06-22

Redwood Valley, United States of America
2018-07-29

Big Bend Yuba River, United States of America
2018-09-21

Oceano, United States of America
2018-09-24

Oceano, United States of America
2018-10-13

Fort Mason, United States of America
2019-03-01

Madera Canyon, United States of America
2019-04-21

Mount Davidson, United States of America
2019-05-17

Yosemite National Park, United States of America
2020-01-30

Playa Patzcuaro, Mexico
2020-02-01

San Sebastian del Oeste, Mexico
2020-02-02

San Sebastian del Oeste, Mexico
2021-06-11

Bishop, United States of America