The beavers live in a 17-hectare fenced enclosure, and the trust said that in areas where reserve staff had been able to access, the animals had been removing trees, coppicing others, creating channels, and bringing much needed diversity to the site.
In other areas there was “improved light penetration, nesting habitat, and insect spawning grounds”.
Alan was named after Alan Carr, who grew up in the county, and Boudica after the warrior, as it is believed she lost her leg in a fight.
Their offspring have been named Willow, Pine, Juniper, Hazel, Rowan, Holly, Ash and Maple.