Wildcat Haven challenged the approval of Vattenfall's Clashindarroch II project in Aberdeenshire.

The females were released into the Cairngorms as part of an efforts to boost Scottish wildcat numbers.

Wildcat identification can be complicated because wildcats have a significant interbreeding history.

The kittens, in the Cairngorms National Park, will be DNA tested at a later date to check they are pure breed.

The Wildcat Haven group says the video shows the animal displaying a previously unseen behaviour.

Wildcat Haven claimed the Scottish government had acted unlawfully by approving the Aberdeenshire project.

Conservation group Wildcat Haven believes the new Aberdeenshire project could endanger wildlife.

Nineteen cats were released into the wild in the summer at Cairngorms National Park in the Highlands.