Hundreds of dolphins more commonly found in warmer seas have been seen in the Moray Firth in Scotland while making a "massive migration" into the North Sea. The environmental charity Earthwatch Institute said more than 400 short-beaked common dolphins were sighted off the north east coast. It said the "super pod" was a sign of how climate change was pushing some wildlife further north. The dolphins' appearance in the firth was hugely significant. "Firstly, the sheer number of dolphins was astounding - there were common dolphin everywhere around us over a two-mile radius. Furthermore, this was only the second sighting in the past few years of such a 'super-pod' of this species in these waters. The first sighting in 10 years was recorded here in July 2007 when we were joined by more than 300 animals in the outer Moray Firth."