Hermit crabs remodel shells with predators in mind

Hermit crabs gather to evict neighbors

Hermit crabs work to safety building codes

Hermit crabs socialize to evict their neighbors

Hermit crabs form gangs to evict neighbors with better shells

A signal for solitude: monkeys create their own rudimentary language sign

Monkeys' "do not disturb" sign

Monkey see, monkey facepalm

Monkey don't see: mandrill's form of communication