The Eurasian tree sparrow (Passer montanus) has a rich chestnut crown and nape, and a black patch on each pure white cheek. The scientific name ‘ montanus ‘ suggests a mountain bird although they are actually mainly a lowland species. Both sexes are similar with a chestnut brown head and nape and white cheeks and collar, with a contrasting black cheek-spot. The under parts are off-white. Tree sparrows typically nest in holes in trees and buildings where the house sparrow is absent. Tree sparrows nest and live in open woodland, hedgerows, parks, orchards and quarries. They tend to remain in one area, except when their young disperse after leaving the nest.