Endangered Carnaby’s black cockatoos, and the teenager building nests for them – video

Eva Czislowski, a student and activist, says Carnaby’s black cockatoos used to blacken the sky. ‘I can't believe that I won't be able to experience that,' she says. The endemic WA bird is just one of 2,000 Australian species listed as under threat, in what scientists are calling an extinction crisis

• From blackening skies to barely casting a shadow – the Carnaby’s cockatoo faces a bleak future