Nesting boxes for birds and bats have been installed in trees across Plymouth's Central Park as part of a conservation programme.
Twenty bird and 25 bat boxes have been placed in trees throughout the park.
The boxes have been funded as part of the new £46.5m Life Centre to enhance biodiversity and the conservation of birds and wildlife.
Plans include a 10-lane 50m (0.05km) swimming pool, a 12-court sports hall and an indoor bowls centre.
Katie Jones, from Devon Wildlife Consultants, said: "The natural nest sites on which many of our bird and wildlife species depend, such as holes in trees and buildings, are fast disappearing and so installing this number of boxes will really help."