Golden-cheeked warblers are an endangered species of bird that nest only in central Texas. They build their nests using bark from ash juniper trees and feed on spiders and insects. Brown-headed cowbirds sometimes lay eggs in warblers’ nests, killing the warblers eggs. Blue jays are known predators of the golden-cheeked warblers’ offspring. The survival of golden-cheeked warblers would be most threatened by an increase in the —