Hundreds of turtle doves are being released this summer as conservationists race against the clock to save the species from extinction in England.

The cooing doves, which mate for life, are the fastest-declining bird species in the country. Just 2,000 pairs are left, a decline of 98% since the 1970s. This is because their habitats in scrubby areas have been destroyed and thousands are shot on their migratory route across Europe.

But their distinctive purr can now be heard on estates in Somerset, Exeter, Suffolk, Lincolnshire and Norfolk as an audacious plan to breed and release hundreds of birds gets off the ground.