Data Zone
Justification of Red List category
This species has an extremely small range, centred around a single location. Its habitat currently remains intact, and hence it is classified as Near Threatened. However, it should be monitored carefully for evidence of future declines.
Population justification
The species is poorly known, and data is currently insufficient to make a population estimate. The species has a tiny range, but is considered common within it.
Trend justification
The population is suspected to be in decline.
Myioborus cardonai occurs on the talus slope and summit of Cerro Guaiquinima, west-central Bolívar, Venezuela (Meyer de Schauensee and Phelps 1978, Ridgely and Tudor 1989, Rodríguez and Rojas-Suárez 1995, C. J. Sharpe and J. Perez in litt. 2000). There is an estimated 500-600 km2 of potentially available habitat, within which the species is common (Rodríguez and Rojas-Suárez 1995, C. J. Sharpe and J. Perez in litt. 2000).
It inhabits montane humid forest and edge, gallery forest and dense scrub at elevations of 1,200-1,700 m (Ridgely and Tudor 1989, Rodríguez and Rojas-Suárez 1995, C. J. Sharpe and J. Perez in litt. 2000, Hilty 2003).
There has been mining for many years at the base of Cerro Guaiquinima but this has a negligible (if any) impact on this species (Rodríguez and Rojas-Suárez 1995, C. J. Sharpe and J. Perez in litt. 2000). There is no agriculture on the cerro and there is no indication of previous human habitation (C. J. Sharpe and J. Perez in litt. 2000). The wet climate and surrounding large river valleys suggest that the spread of human-induced fire into existing habitat is unlikely (C. J. Sharpe and J. Perez in litt. 2000).
Conservation Actions Underway
The entire species's range is protected by Cerro Guiquinima Nature Monument. Recent surveys have clarified this species's current distribution and habitat preferences, and assessed potential threats (C. J. Sharpe and J. Perez in litt. 2000).
13 cm. Yellow and grey warbler with obvious white outer-tail. Olivaceous grey upperparts with black crown. White eye-ring and chin. Orange-yellow underparts. Blackish tail with white outer rectrices. Similar spp. Slate-throated Whitestart M. miniatus lacks white facial features and has dark throat. Voice .
Text account compilers
Butchart, S., Gilroy, J., Sharpe, C J
Contributors
Perez, J., Sharpe, C J
Recommended citation
BirdLife International (2024) Species factsheet: Guaiquinima Whitestart Myioborus cardonai. Downloaded from
https://datazone.birdlife.org/species/factsheet/guaiquinima-whitestart-myioborus-cardonai on 23/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from
https://datazone.birdlife.org/species/search on 23/12/2024.