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Risso's dolphin at surface

My lucky number – 13 years studying amazing Risso’s dolphins

Everything we learn about the Risso's dolphins off the coast of Scotland amazes us and...
Dead sperm whale in The Wash, East Anglia, England. © CSIP-ZSL.

What have dead whales ever done for us?

When dead whales wash up on dry land they provide a vital food source for...
Risso's dolphin © Andy Knight

We’re getting to know Risso’s dolphins in Scotland so we can protect them

Citizen scientists in Scotland are helping us better understand Risso's dolphins by sending us their...
Pilot whales pooing © Christopher Swann

Talking crap and carcasses to protect our planet

We know we need to save the whale to save the world because they are...
Fin whale (balaenoptera physalus) Three fin whales Gulf of California.

Speaking truth to power – my week giving whales a voice

The International Whaling Commission (IWC) meeting is where governments come together to make decisions about whaling...

Why do whales and dolphins strand on beaches?

People often ask me 'why' whales and dolphins do one thing or another.  I'm a...
A spinner dolphin leaping © Andrew Sutton/Eco2

Head in a spin – my incredible spinner dolphin encounter

Sri Lanka is home to at least 30 species of whales and dolphins, from the...
Orca (ID171) breaches off the coast of Scotland © Steve Truluck.

Watching whales and dolphins in the wild can be life changing

Whales and dolphins are too intelligent, too large and too mobile to ever thrive in...

Risso's dolphins caught on camera by WDC field team

WDC’s field team in the Outer Hebrides recently recorded this great video footage of Risso’s dolphins in the surrounding waters. 

Stomach contents from strandings data from a limited number of UK Risso’s dolphins shows that their primary prey is octopus. However, a recent report by scientists shows that the relationship between the observed distributions of Risso’s dolphins and octopus (Eledones cirrhosa) is not as clear cut as we might expect in Scottish waters.

Whilst it would make sense that important areas for octopus could be defined as ‘critical habitat’ for Risso’s dolphin, it has not been possible to determine that Risso’s dolphins prefer areas containing good numbers of octopus or use them with greater frequency than any other area. WDC believe that it’s most likely that this link cannot be made as the existing data are not detailed enough.

A larger Risso’s dolphin sightings dataset, including fine-scale data, is required to understand where this species occurs and especially where it is feeding. WDC is helping to fill this important data gap.

In addition to modelling the distribution of octopus, direct modelling for Risso’s dolphin habitat is required. As is the collection of more octopus and other important prey data distribution.

In the meantime, we know that the Isle of Lewis has always been one of the best places to see Risso’s dolphins in the UK. Our data is starting to show that the group sizes seen today are smaller than they were in the 1990s. MPA protection for Risso’s dolphins can’t wait for the collection of all this data – we have enough to be confident in this area of critical habitat.

If you would like to support MPAs for Risso’s dolphins and other Scottish whales and dolphins, please write a letter to the Scottish government.