||Sclater & Salvin, 1861
||12.5 cm. Smart black, yellow and white warbler. Adult male black above with yellow supercilium and cheek-patch split by black eye-stripe extending from bill through eye to rear auricular region where it joins with black nape (Pyle et al. 1987, Ladd and Gass 1999). Wings black with two white wing-bars and fringing to the flight feathers, black chin, throat and streaks down flanks on white underparts. Female similar but olive to gray streaked black on crown and mantle, chin and centre of throat yellow or white surrounded by variable amounts of black mottling along the sides. Immature drab with indistinct streaking and black eye-stripe. Similar spp. Black-throated Green Warbler D. virens, but first-winter female D. chrysoparia has more distinct, dark eye-stripe, no auricular patch, darker, less olive and usually faintly streaked blackish upperparts and no yellow in vent. Voice Multiple songs: the “A” song is a variable and buzzy zee zee zeedee-zee, while the “B” song is lazy-daisy (or variations); numerous other vocalizations (J. Reidy in litt. 2012). Hints Best located by voice in canopy. Forages in mixed flocks in winter.
|Red List Category & Criteria:
||Komar, O., Ladd, C., Lockwood, M., Lyons, J., Peak, R., Sterling, J. & Reidy, J.
||Bird, J., Harding, M., Isherwood, I., Pople, R., Sharpe, C J, Wege, D. & Symes, A.
This species has a very small and fragmented occupied breeding range, which is declining significantly. Although conservation action may have ameliorated some of this decline, the species still qualifies as Endangered.
|Previously published Red List assessments:|
- 2012 – Endangered (EN) –
- 2008 – Endangered (EN) –
- 2007 – Endangered (EN) –
- 2004 – Endangered (EN) –
- 2000 – Endangered (EN) –
- 1996 – Endangered (EN) –
- 1994 – Endangered (EN) –
- 1988 – Threatened (T) –
|Range Description:||Dendroica chrysoparia is a local breeder in mature juniper-oak woodlands in the Edwards Plateau, Lampasas Cut Plain and Central Mineral Region, Texas, USA (Ladd and Gass 1999). It occurs at an average density of 15 males/km2 in c.350 km2 of occupied habitat, and the population was estimated to number 21,000 individuals in 2004 (Rich et al. 2004). There was a 25% loss in available territories between 1962 and 1981 (Ladd and Gass 1999), and the population has clearly declined. It winters in southern Mexico (Chiapas), Guatemala, El Salvador, Nicaragua, and Honduras, where it is uncommon to fairly common (Ladd and Gass 1999, Jones and Komar 2007). There are recent reports/records from Costa Rica (Garigues 2002) and Panama (Jones and Komar 2006). |
El Salvador; Guatemala; Honduras; Mexico; Nicaragua; United States
Belize; Panama; Virgin Islands, U.S.
Present - origin uncertain:
|♦ Estimated area of occupancy (AOO) - km2:||350||♦ Continuing decline in area of occupancy (AOO):||Yes|
|♦ Extreme fluctuations in area of occupancy (AOO):||No||♦ Estimated extent of occurrence (EOO) - km2:||19700|
|♦ Continuing decline in extent of occurrence (EOO):||Yes||♦ Extreme fluctuations in extent of occurrence (EOO):||No|
|♦ Number of Locations:||2-5||♦ Continuing decline in number of locations:||Unknown|
|♦ Extreme fluctuations in the number of locations:||No||♦ Lower elevation limit (metres):||200|
|♦ Upper elevation limit (metres):||3000|
|Range Map:||Click here to open the map viewer and explore range.|
Conservation Actions Underway
In the USA, it is listed as Endangered and has a recovery plan (Ladd and Gass 1999). There is a cowbird trapping programme in Balcones Canyonlands National Wildlife Refuge, Texas (Sexton 1997, Ladd and Gass 1999) and regional habitat conservation plans have been approved or are under development in Travis, Hays, Comal, and Williamson counties, Texas (Ladd and Gass 1999, J. Lyons in litt. 1999). Various reserves are managed for the species in Texas (J. Lyons in litt. 1999). Surveys in 1993-1995 improved knowledge of its wintering distribution (Ladd and Gass 1999). It is known or suspected from Rancho Nuevo and Lagunas de Montebello National Parks, Mexico, Sierra de las Minas Biosphere Reserve, Guatemala, and Celaque, Cusuco and Santa Bárbara National Parks, Honduras (Thompson 1995, Ladd and Gass 1999). Currently there is an ongoing effort involving Pronatura Sur, Defensores de la Naturaleza, and Salva Natura to gather information on the warbler south of the US, including details on its wintering habitat, and a community education initiative is underway. Surveys to monitor breeding populations are ongoing. The Leon River Restoration Project in central Texas is working on a habitat restoration project with Golden-cheeked Warbler and Black-capped Vireo as the primary focus. Conservation Actions Proposed
Monitor winter distribution and habitat quality. Monitor breeding populations. Better define ecology and habitat availability (Ladd and Gass 1999). Control cowbird populations where appropriate. Protect a highland pine-oak corridor in Mexico and north Central America (Lyons 1990). Implement community education schemes in the breeding range (Ladd and Gass 1999). Restore connectivity between northern and southern breeding populations to promote gene flow (Lindsay et al. 2006).