These videos from Gombe National Park are part of Dr. Kate Detwiler's study group. The first clip shows a red-tailed mother and her baby, which looks like a red-tailed monkey, but is still too early to tell. The next clip shows a monkey that is a hybrid female. Her behavior is referred to as "puckering." She is puckering her lips to communicate to a male, who she approaches, to indicate that she is ready to mate. The last clip is a red-tailed adult male. An alpha male in the group will make such loud calls to warn group members of predators and also uses these calls for group cohesion.