A new study has revealed that dolphins, which are believed to be the cleverest creatures in the animal kingdom, may not possess high intelligence.
Zoologist Justin Gregg, author of 'Are Dolphins Really Smart?' said that in terms of intelligence they are nowhere near as special as they have been portrayed, the Daily Express reported.
According to Gregg, a researcher with the Dolphin Communication Project in America and co-editor of journal Aquatic Mammals, although dolphins show signs of complex behaviour- such as living in large social groups, empathy and communicating with peers- chickens, pigs and bears also show these traits.
The researcher also claimed that other scientists had made mistakes, most crucially that dolphins' large brains equal greater intelligence and that the complex sounds they make are a form of language.