This IBA includes the Cuilco Mountains and the valley west of the city of Nenton, which is the southern limit of the central valley of Chiapas, Mexico.
Cuilco is important for species of the North Central American Highlands (8 species recorded), including populations of two threatened species, Highland Guan (Penelopina nigra) and Pink-headed Warbler (Ergaticus versicolor). The site supports biome-restricted species of the Madrean Highlands (25 species recorded) and the Pacific Arid Slope (5 species). Recent ornithological information is limited to two rapid assessments (Sandoval 2000, Pérez 2006).
Pressure/threats to key biodiversity
Natural habitat is threatened by an advancing agricultural border and forest fires.
No part of this IBA has a status of legal protection (CONAP 2007).
Habitat and land use
Forests (mainly conifer and mixed) cover 16% of the IBA. Natural arid scrub and secondary growth scrub cover 37%. More than 30% are used for agriculture (mainly corn fields and coffee plantations) (MAGA 2006).
BirdLife International (2020) Important Bird Areas factsheet: Cuilco. Downloaded from
http://www.birdlife.org on 26/02/2020.