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This year, they used a drone as part of their surveying – with footage capturing the never-before-seen underwater headstanding of the dolphin, which is thought to be at least 20 years old and was on its own at the time.
The team from the charity use non-invasive techniques to study the dolphins, recording individuals from boats at a distance. WDC has been monitoring the population of Risso's dolphins, photographing their dorsal fins which are as unique as fingerprints, off the coast of Lewis for more than a decade. She said it is important to study their behaviour to understand their needs and requirements in order to better protect them and their habitat. Ms Hodgins, who is also policy manager for the charity, said it shows how little is known about the social and cultural lives of the mammals. Whale and Dolphin Conservation (WDC) researcher Nicola Hodgins said they did not know why the animal had been behaving in this way, though one theory is that it could have been listening for the calls of other creatures in the water.
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