Guinea pigs
German residents file complaint over group sex of guinea pigs  - Reuters file photo

Residents of the German town of Munster have filed a complaint about the loud sexual noises coming from the university - and pinned the blame on a gang of horny guinea pigs.

According to the complaint, filed in Munster's administrative court, the guinea pigs' group sex in the university's research facility is too loud to bear.

The university has a little more than a dozen male and female guinea pigs inside a huge cage outdoors. The sign outside the cage reads: "These animals live in non-committal, mixed-gender groups and mate with every possible partner," according to the Bild newspaper.

But residents next to the Institute of Neuro and Behavioural Biology Department building say the animals are "unbearable".

"The guinea pigs are unbelievably loud and stink to high heaven. It's unbearable," said 69-year-old Pavo R.

The Bild report suggests the guinea pigs' cage is too close to the man's house. While the law says it should be at least three metres away, the actual distance between the cage and the house is only two.

The institute hopes the cage will not have to be removed from its present location as the facility is involved in key behavioural research.