Chimpanzees in Uganda may have changed their hunting strategy in response to being watched by scientists.
While studying the animals, researchers documented very different hunting habits of two closely neighbouring chimp "tribes".
"Sonso" chimps hunt in small groups for colobus monkeys, while those from the "Waibira" troop hunt solo and catch "whatever they can get their hands on".
The findings show how sensitive chimp society is to human presence.
They are published in the journal PLoS One,
Biologists who have followed and studied these animals for years think that work may have disturbed the group hunting that seems key to chasing and catching -read more and see video
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