At the same time, they reduced the diameter of the entrances to some of the nest boxes, in order to deny admission to cowbirds (which are larger than warblers).

ECONOMIST: How cowbirds run protection rackets

More hazel and honeysuckle are to be introduced to the site along with 50 permanent nest boxes.

BBC: Dormouse in hand

Volunteers are also being asked to help build and put up the nest boxes in the chosen locations.

BBC: Barn owl at a farm

Landowners will be given free nest boxes and will be asked to monitor the birds and send back information so a countywide picture can be drawn up of where numbers are doing well and where they are struggling.

BBC: Barn owl at a farm

Two hibernation boxes and 17 summer bat nest boxes have been placed in nearby trees to encourage the bats to move out "temporarily".

BBC: Pipistrelle bat

More than 90 nest boxes have been put up as part of a project to help boost barn owl numbers in Somerset.

BBC: Barn owl at a farm