Western Scrub-Jays are medium-sized birds of the crow and jay family. They live in southwestern parts of the United States, down into Mexico. Their preferred habitat is pinyon-juniper forest and other woodland habitat.
Like many other corvid species, Western Scrub-Jays cache surplus food for future use. They may also steal food from other bird caches and take measures to protect their own food stores from theft by other birds.
Western Scrub-Jays exploit deer parasites; they will stand on the backs of mule deer and eat ticks and other insects on the deer in a mutually beneficial relationship.