Dave Watts / Fairy prion (Pachyptila turtur) on ground, Tasmania, Australia.

Brent Stephenson / Fairy prion (Pachyptila turtur) in flight low over the sea, showing underwing pattern. Hauraki Gulf, Auckland, New Zealand, October.

Brent Stephenson / White-faced storm-petrels (Pelagodroma marina) feeding with fairy prions (Pachyptila turtur) over a school of fish. Hauraki Gulf, Auckland, New Zealand, December.

Grant Maslowski / Fairy prion (Pachyptila turtur) with chick, nestled in artificial nesting box, St Clair, Dunedin, South Island, New Zealand.

Grant Maslowski / Fairy prion (Pachyptila turtur) chick, resting at night, St Clair, Dunedin, South Island, New Zealand. Controlled conditions.

Grant Maslowski / Fairy prion (Pachyptila turtur) chick, resting at night, St Clair, Dunedin, South Island, New Zealand. Controlled conditions.