LLWOLF 1963 Aimophila semiclarostis August 17 3 mi. E. Telurantepec, Oaxaca 0720 - watched this pair fly out to edgey cut then in small bush just at level of tops of grasses. Then disappear into thick, 2+ feet high grasses. When I approached flurbed one bird from grass. Flew to dead limbs 18" above ground + bird wiped. Then back to small hesh at grass top level + down into grass. Verif saw one of this pair at 0730 when it was 6 feet up on some cut, small trees that were propped against others. Perched on 2" diameter branch + had "bug" in bill. Agitated. Finally flew across cut to south + disappeared in forest. About 3 minutes later another bird flew in same direction. Probably feeding young. In search of area could find no nest or fledged young. By 0745 - song has ceased + chatter is only heard occasionally. One pair is chatting much more often than rest of pairs I hear put together. 0750 - heard bird sing 5-10 songs out closer to road. Sun is not already + a stiff breeze has come up. 0830 - following yet another pair. They are working in canopy + sub-canopy of shrub layer when I see them. Drop down to ground + I imagine this is where they forage. When this pair chatters another usually answers from 15-30 yards to west. Chattering usually done from 3-6 feet above ground on dead or otherwise exposed limb, but will below the shrub canopy. This in marked contrast to birds