animal
ape
behavior
black
bonobo
brood
captive
captivity
chimp
chimpanzee
closeup
emotions
expression
expressive
face
frustration
funny
fur
furry
hands
intelligence
intelligent
jungle
look
mammal
monkey
nature
outdoor
pan
pan paniscus
pan troglodytes
philosopher
philosophy
ponder
portrait
primate
prisoner
rain forest
rainforest
sad
sadness
safari
sit
think
thoughtful
thoughts
watch
wildlife
worried
zoo