L.W. O/F 1964 Hirundo numeralis July 18 Cañon de Lobos, Pai.E. Cuernavaca, Morelos, Mexico 1050 - hear another chip pip call & pitza from farther to S. bird gives pitza + changes pitch when continues chip + chip-trill call. 2nd bird becomes silent. July 19 Cañon de Lobos, Pai.E. Cuernavaca Morelos, Mexico Cañon de Lobos 0613 - located pair #1 near road. one flushed from ooz near ground into small shrub. Other nearby. Area is Acacia + 6-8 foot tree dominated. Trees are 2nd growth from recent cutting. Gives nearly closed level at ~ 5 feet. Watched birds foraging from ground up to about 7 feet. Most of 4+ minutes watched were at less than 4 feet. Dropped down to ground for only short intervals + then back up into lower branches. Low foraging height due to height of shrubs. 0626 - chatter, duet - began with several pitza notes that sounded as if spluttering. 1020 - hear sharp chip from area of pair #1, finally locate bird foraging in canopy 10+ feet above ground. using bar perches pecking into leaves. moves by hops from perch to perch. Also sit in leaf clusters but still lands on small bar portions of twigs. July 2 Cañon de Lobos, Pai.E. Cuernavaca, Morelos, Mexico Dick reported that while he was squealing for birds two pair came together, when he ceased squealing all four moved off in the same direction. He wasn't sure if they remained together.