A chain of limestone hills covered by Quercus woodland and scrub. The main human activities are livestock-farming and cork harvesting (`Other' land-use, below).
The site is a major migratory bottleneck, where 20,000 storks and raptors regularly pass.
BirdLife International (2019) Important Bird Areas factsheet: Bujeo, Ojén, del Niño and Blanquilla mountain ranges. Downloaded from http://www.birdlife.org on 12/12/2019.