Short-haired bumblebees to be released on nature reserve
3 June 2013 Last updated at 09:01 BST
More short-haired bumblebees are to be reintroduced to the countryside in Kent.
The species of bee was once widespread across the south of England but vanished in 1988.
Last year, 50 queens collected in southern Sweden and released onto the RSPB's Dungeness nature reserve are believed to have been affected by bad weather.
More short-haired bumblebees, currently in quarantine to check for parasites, are due to join them on Monday.
Insect expert Tim Melling explained the project.