R. K. Selande, 1954 O. zonatus 7mi. SE San Cristóbal, 7300ft., Chis., Mexico. April 22 Perhaps the birds pair up and remain spatially segregated a good part of the time, only coming together in large flocks when something disturbing appears. Some of the birds collected today are not breeding, and on basis skull orification there are several age- groups represented. Collected plants Nos 100-109 in vicinity of nests. No. 105 is the tree in which the first-found nest was placed. plants Nest containing the three nestlings and two eggs (one of which was infertile, the other held an embryo) was about the size of a large chippenes' nest - about 14-15" long and ±12" deep. A tunnel led to the interior cavity where the young were located. This cavity was lined with moss, lichen, and vegetable fibers of other types. The outer portion of the nest was composed of twigs of a hard, shining type, pieces of dry oak, joy feathers, hawk, feathers - a mixture of many types of materials. I noted a piece of tin foil in the center cavity. - The other nest was smaller than that of chippenes'. Another nest seen in an oak up the canyon was smaller than the large nest described above. Outer twigs may be 1/4" in diameter and 6" long or so.