Capt. Lewis, September 20 1805--I have also observed two birds of a blue colour, both of which I believe to be of the haulk or vulture kind one of a blue shining colour with a very high tuft of feathers on the head, long tale, it feeds on flesh—the beak and feet black, its not is cha-ah, cha-ah. it is about the size of a pigeon, and in shape and action resembles a jay bird.
Capt. Lewis, March 4 1806--The blue crested Corvus . . . . [has] been previously discribed and . . . . [is a native] of the piney country invariably, being found as well on the rocky mountains as on this coast.