K.Selander, 1952 Campylocheilus brunneicapillus July 21 39 mi. SSW Camargo, 4000 ft., Chihuahua, Mexico. - found nest containing undetermined number of young in a tree cactus (the one used for "native lamps"): Nest about 6 feet above ground in a cluster of small branches. Nest about 6" x 6"; hole facing upwards at about 30°. Two other nests (none containing young) found in similar trees about 70 and 80 feet away. Tree cacti uncommon in vicinity. Only one adult bird seen; it flew to the nest-tree with a large insect (grasshopper?) in its bill. I had previously moved the nest a bit, so that the adult appeared concerned; kept looking at the nest; nervous; after 2 minutes it swallowed the insect; flew to top of tree (about 15 feet from ground) and began making a note - "chew - chew - chew - chew - chew" or "cha-cha-cha-cha- cha, etc."; a loud, throaty sound, not nasal; repeated rather quickly); stopped making note and sat in tree. I approached and the adult flew; flying close to ground; secretive, rather difficult to approach closely. Always fly near ground. Repeated note which is apparently note of warning or disturbance. Nest made of long, fine strands of grass-like material. Young in nest have many feathers partially grown. Made a begging sound when I first approached and touched the nest; silent when I examined nest a second time. General character of the vegetation is that of low shrubs (rarely over 3 feet in height) including mesquite.