LL Wolf 1964 Aimophila rufescens August 7 Sui.E. Cumanaca, 5900± ft., Moulas, Mexico ↑ up onto dead branch 6± inches off ground where preened. σ worked toward lava hill in praying. ↑ then up into tree to see possibly in response to chip notes from that area. Worked into top of tree (30± feet) where sat wing + tail flicking, changing directions + pitches, + head raising. σ flew up into small tree (6' up) at wedge of lava hill & gave squawk although 2 are separated by 50± yds. σ did not squawk but changed trees. song ↑ moved up slightly higher, & sang. ↓ dropped down to shrub (beneath tree where moved about nervously (wing-tail-head flicks) then into 8 foot shrub, 10± yds closer to lava hill where moved about nervously then sat preening - σ had dropped & ground & moved by short flights hops along wedge of lava hill then flew over to shrub where ↓ sat. landed 3± feet below ↑ & squawked. ↓ rapidly changed directions or pitch twice thru 180° accompanied by alternate bouts of flicking vigorously right, then left, right, left wings. also spread + contracted tail. σ did not seem to be contributing to squawk. σ then moved up to just below ↑ & another squawk. This time ↓ turned & bent slightly down to face σ & spread tail. wing flicking very reduced & ↓ again did not seem to squawk. Unable to see if σ wing-flicking but as he is in center of bush I doubt it. After sitting quietly for short time both birds flew over to ground 10± yds. to N. where squawk on arrival, both squawking. chirp chirp notes from one of pair #7 & one of pair #2 moving in that direction. Then chirp notes from pair #5 & pair #2 flies to them & hear squawk. Pair #2 then continues towards road along