The RSPB is calling for British people to help map swift nests using a new app because numbers of the bird, which heralds Spring, as their numbers have more than halved since 1995.

RSPB maps threat to 'lost' birds THE fight to save birds under threat is about to take off in Greater Manchester. News. men Administrator. 02:12, 13 Jan 2013 Updated 12:44, 22 Jan 2013.