There are about 40 members to a group. There are 100 chimps in Mahale Mountains National Park. In this group, there are 10 males, 40 females, and 50 juveniles. They move daily in large groups. When food is scarce, they move in small groups. The males stay in groups more but females stay alone with their kids more often. They wean their kids at 4-5 years old.
Sometimes a chimp will eat the leaf of some plant, but they don't chew it, just swallow it and it is thought that they do so for medicinal rather than nutritional purposes. They also lick salt from nearby rocks. Chimps will eat meat 2-3 times/week. They especially like to eat leaf-eating red colobus. They also eat bushbucks, bushpigs, and rodents. Among primates, they will eat blue monkey, red monkey, and galago. Galago is nocturnal so during the day if they find one they'll eat it. Once they have caught some meat, males will share with another male or a female if she's in heat. A female who gets meat will usually only share with her young.
Babies ride underbelly first year, then in jockey position until 4 or 5 years old. Females make a bed to nap in during the day and another to sleep in during night, but males only do it at night. Babies learn how to do it from their moms. Making your own bed is a final stage in a juvenile's education. If a new female shows up and was in between two group' ranges for a while, the males from the group that adopts her might kill her baby since they're not sure that it wasn't someone from the other group who sired it. This was a really sad part in the movie 'cause they were kind of graphic about it.
Babies begin playing hard at about 3 years, but they play lightly from 3 months. They continue playing 'til about 7 yrs old. Baby chimps, like human babies, chew on anything that catches their eye. They stick their fingers in holes etc. At age 6 months to 1.5 years, when baby switches from underbelly to jockey position, the babies often dangle from shoulders and things while they're learning. Chimps nurse about 2 min/hr until they're about 5 years old.
I didn't like this movie nearly as much as the other ones. The narrator had a really strange speech pattern which kept distracting me from what he was trying to say.