C. Koford 1956 Aloatta palliata September 1, 1956 Baro Colorado Island, Coral Bay Upon arrival BCI, groups in tall trees close to landing on S side of Davis steps. Three young seen, about half grown, & at least 5 adults. || Heard every morning about 5:45 a.m., occasionally at night, & at start of hard rainstorm. When alarmed by man, continue woof-woof like barking. Before start barking often sounds mmm - mmm - mmm- like whining puppy. At start of morning howls, call be-gins with slow clicking throat rattle, restrained, then builds up to roar. Apparently howling contagious from claw to claw so roaring travels over island. Often seen in very same trees with Colubs, & in same places at different times, but travel much slower than Colubs & do not make spectacular croching leaps from one tree to another. October 2, 1956 One aloote apparently sick on fork of branch 75 yds W of Old Lab. Little movement, no sounds, & no response to sounds by me. It had white area on tail about halfway to end [illegible]. Morning of Oct. 3 still there - probably sick also. pelage in good condition. Gone by noon Oct. 3. || Dr. A. Mrs. Desjardine on Oct. 4 saw 1 F & juv. with 3 ?? near TB 18, one male had cut & swollen upper lip. September 29, 1956. Near Chapman House a group of 5 in- cluding a half grown young. S