5 mi. N Tehuacan, 1676m. May 27 flushed no more than 4 fled up. (See photos, roll 28 showing nest in large mesquite 7 small tree [with nest removed] in background). I flushed a lucid twice from this nest during the day. On the second time I collected the bird (# 2346), a f with brood patch, and took 4 eggs - just slightly incubated - from the nest. The nest was constructed of dry grass stems a fine thin twig and was lined with a thick shell of chicken feathers. Other nests I have examined have contained fewer feathers. This morning when we got up around 7:00 - three lucids were building a nest (see 3 photos) in a yucca head directly over the cor. We watched for 1/2 hour or so as they brought fibers to the nest which they extracted from well down in the yucca heads. Dead fibers hanging on sides of heads were torn off and carried to the nest. After working at this for 3 hours! we did not see them carrying material again but we did notice several lucids - presumably the same ones - in the dense mesquite-tina stand adjacent to the line of yuccas. In late afternoon I collected a bird in the yucca line - # 2345 - which I believe to be one of the lucids working this morning. Bonnie says that while I was out hunting only 2 lucids were working on the nest - but there were 3 present working earlier. I am certain. There is a good possibility that these birds were the same 3 which I flushed from