Monkeys recognize bad grammar:

In the journal Biology Letters, researchers said that cotton-top tamarins are able to spot if the order of syllables in a word is "wrong".

They familiarised the monkeys with two-syllable terms, and recorded their reaction to words that were not consistent with that syllable pattern.

The team says the work illustrates how many animals use patterns that have become intrinsic to human language.

(Thanks to Slog tipper Original Monique, via Twitter.)