Oils 1956 Elanus leucurus 2 mi SE San Jose, on Oct. 17, Santa Clara Co., Calif. 270ft. Saw two birds. They were perched in walnut trees near a plum orchard. They are very falcon shaped, long pointed wings with black below on wings. The flight pattern is very distinctive. When perched they appear almost entirely white, with a black line on head and some black on wings. They often hover in one spot much like a Falco Sparveriuss However, the very whiteness will distinguish them.