User:Shaunbp/Primate cognition/Bibliography

The ability for non-human primates to understand call systems that belong to a different species of monkey happens but to a limited extent. In this case Diana monkeys and Campbell's monkeys often form mixed species groups but they are seem to only respond to each other's danger related calls.

{for class peoples} I just edited the page directly instead of doing the sand box by mistake. but this is what I added to the article.