Dolphin watchers in west Wales have spotted unusual behaviour as a female repeatedly tossed a newborn calf into the air.

They say it is the first time such 'violent' behaviour has been seen by a mother in Cardigan Bay although males dolphins do sometimes kill the young.

Dr Peter Evans, from the Sea Watch Foundation, said it might have been a case of a severe telling off, because the calf was wandering away from her.

He added the youngster was unharmed.

"She was nosing it away in a particular direction, then suddenly she threw the infant right up into the air, and then did this about three times," Dr Evans said.