Ascension frigatebird - the return continues

... For over a century, these seabirds have been confined to breeding on the small outlying islet, Boatswainbird Island, after taking refuge there from the feral cat population on Ascension’s mainland. Cats were introduced onto the island in the early 19th Century to control introduced rats and mice, but instead made a significant dent on the seabird populations. The RSPB initiated a project in 2002, supported by funding from the Foreign and Commonwealth Office, to remove feral cats from the island that proved successful, with Ascension being declared feral cat free in 2006. The seabirds began to return to nesting on the mainland immediately, starting with the masked boobies, but it wasn’t until 2012 that the island’s most iconic seabird began its return.

From RSPB