Two types, common and white-necked (probably from lack of showers on the trail). Well known as robber of other bird's nests. Puts hole up to inch diameter, but always leaves a clean edge along the break. Nidicolous omnivores - kills new born lambs by pecking their eyes. pick on fresh brands on cattle. Edgar Allen Poe never passes on what is heard from these birds. Rocky mountain spotted fever antibodies have been isolated from these birds and their ticks. Primary diet is insects, acorns, fruit and small birds.