C. jocouus 3 9.5 mi. NNW Huajuapan de león, Oaxaca May 7 Krn 334 - Pair near two & two nests. Preening feathers. other bird as they perch side by side. One entered lower nestishldly at 10:27. other bird foraging in palo blanco. (Nest nests open upward at an angle). This lower nest open horizontally. The other nest in the tree is old and "in poor repair - appears to be smaller. Birds hop, tail is cocked at an angle most of the time. Fly - recently go to ground & forage, then work up a tree trunk to top of tree. Often hang upside down on trunk. When sitting quietly, the tail hangs down & curve under in a bit. Some light hammering with bill. Birds forage at all levels from ground to tree tops. Carter man call heard from another pair some distance off - this call is just about similar to that of brunnescapillus and in some ways recalls twittering flight call of zonotius also. Disturbed, especially for so small a bird. Bird off nest at 10:31 possibly disturbed by us. Pair moved off to another tree - one sat motionless as other preened itself then the other inner wing or breast and about the base of tail - Bird being preened is motionless. I left nest again as we approached - gone Carter man call or flew-off, lower nest measured 9x6 - had a tunnel 3" leading to inner cavity containing 4 eggs, (Picture of nest situation & eggs). Nest lined with palm fiber and contour feathers of Pheilo whiles', also some fine grass. Outer shells dried grass & fine stems.