Dozens of swift nesting boxes and speakers playing the birds’ calls have been installed on farms in Wiltshire, Hampshire and Dorset.

The project follows a survey of the Allenford and Martin Down Farmer Clusters by the Game and Wildlife Conservation Trust (GWCT).

Volunteers spent three days installing 31 boxes and eight speakers to entice the red-listed birds.

The boxes will be monitored but the trust says it may be two to three years before the birds begin to nest there.