LW615 1963 Amophila sumichrasti August 17 2 1/2 miles E. Tehuantepec, Oaxaca, Mexico 2312 - broad patch refetchering, back molt. #1 primary - 1/2 grown. some new 2o coverts. 2315 - ventral molt. + 2o coverts - quarter. 2316 - moist on head, lower back, + ventrine stage 4 broad patch. 2317 - no molt. Watched 2 birds chattering + moving them from first vegetation 3-8 feet above ground. One would fly to dead branch + land. 2nd would then land in almost identical spot forcing first to move. 1st usually flew 3-10 feet further + whole process was repeated. Watched 10+ exchanges of this type. Heard chatter call being given but not sure by which bird. Also not able to collect either bird so uncertain as to which sex was which. John says he thought it was no. 2 bird forcing or to fly when he watched a similar action. Whole bout lasted 1+ minute + covered about 30 feet in straight line, but birds traveled on arc. Today encountered pairs of birds or singles. Found no family groups, but John caught 2 fledglings.