This endangered species is threatened by habitat destruction, and in some parts of its shrinking range more than 90% of the nests are parasitized by cowbirds. It is restricted to open oak-juniper habitat where it feeds almost exclusively on insects and spiders gleaned from leaves and branches in dense low vegetation. The deep, cup-like nest is hung by its rim in the fork of a small branch in a short tree, and it is constructed of grass, leaves and spider silk.
The four-digit banding code is BCVI.
