alcedon again (1561) 9 meters west. Left tracks in same place but didn't reset tho 4 that captured. Set & rest traps around piles of old tin came in a cavern, fainted chase or fox? Night clear + calm. Saw 2 bare in road at dusk. Heard fox bark. Photo of two tracks 39" from river to cut desert grave Heavy dew. Opposite track across area, [illegible] foxes near fox. Tracks at Cueva Embajador caught nothing; tracks near Cueva Grande recaptured alcedon and Argyz, and one other adult & alcedon tagged 1563. Many mouse tracks across the desert! Rescued trees (see wolf) and found 36 fresh diggings of last night or this morning. Most of them separate from yesterday, but 13 of them not seen yesterday (but about 13 of yesterday's without fresh sign today). Lots of digging activity in the morning and scattered singing between 9 and 11. Each tree seems to sing only once for < 1 min, then stops for a long time (10 min?). Some counts: 44 notes in 5 sec, 26 notes in 10 seconds, 85 notes in 30 secs and this series continued for < 40 seconds. [ = 3/sec, 2.6/sec, 2.8/sec]. Singing is definitely contagious. Two trees 4 yards apart simultaneously (one feeding, one digging), turned out to be & and ? when tracks/sed clues Several of the trees we have seen digging or feeding but have black rumps, and a male treetops also did also: all the hair tips cut off (by biting?, parasites?, fighting?) leaving a fringe of brown circling the base of the tail. Looked briefly for deer and antlers but didn't see any.