two birds that are following each other, one seemingly giving a soft, purring sound, the other occasional soft woof calls, then a third bird; regular song at the start; I have amplified the first 1:08 more than I would like in order to be able to barely hear the purring notes, which I could hear clearly (though very softly) in the field; these purring notes are continuous for the first 50+ seconds, during which time there are about seven of the woof notes; I don't recall picking up on this note before--this species does not call much, and my recordings of calls are rare;

singing from medium height in a tall cottonwood

bird-seen:yes

playback-used:no

two birds landing, they continued to flap a bit after actually landing

bird-seen:yes

playback-used:no

wildtronics mono amplified Tascam DR05

bird-seen:no

playback-used:no

From perch a few m above ground in Acacia scrub. Reference: LIVA 301-310 (Colpas1). Krabbe & Nilsson (2003) (ISBN 90-75838-06-9). Filtered version on Moore et al. (2013) (http://johnvmoorenaturerecordings.com/pubs/ECUAD/main.htm).

bird-seen:yes

playback-used:no

bird-seen:yes

playback-used:no

singing from 15m up in the subcanopy of a cottonwood tree; different than recorded earlier today

bird-seen:yes

playback-used:no

not seen; 2-3 m up inside a mesquite bosque; vehicles on Mexico 2 in background of second half;