Yva Momatiuk & John Eastcott / Gentoo Penguin (Pygoscelis papua) parent huddling with two chicks, Booth Island, Antarctica

Bryan and Cherry Alexander / Remains of a penguin egg shell caught in cracks in the rock, Booth Island, Antarctica

Kevin Schafer / Gentoo Penguin (Pygoscelis papua) group of four walking in snow, Booth Island, Antarctic Peninsula, Antarctica

Kevin Schafer / Gentoo Penguin (Pygoscelis papua) group walking in line, Booth Island, Antarctic Peninsula, Antarctica

Doug Allan / Gentoo Penguin (Pygoscelis papua) colony on Booth Island, Antarctic Peninsula, February. Freeze frame book plate page 105.

Bryan and Cherry Alexander / Visitors taking in the view at Port Charcot, Booth Island, Antarctica, February 2009.

Bryan and Cherry Alexander / Booth Island illuminated by shafts of sunshine through the cloud. Lemaire Channel, Antarctica, February 2009.

Bryan and Cherry Alexander / Visitors and Gentoo Penguin (Pygoscelis papua) against dramatic landscape at Port Charcot, Booth Island, Antarctica, February 2009.

Bryan and Cherry Alexander / Tourists by the Cairn at Port Charcot, Booth Island, Antarctica, February 2009.

Troels Jacobsen/Arcticphoto / Antarctic Minke Whale (Balaenoptera acutororostra) surfacing in front of an ice-shelf. Booth Island, Antarctic Peninsula.

Gabriel Rojo / Lemaire Channel Mountains, Strait between the Antarctic Peninsula and Booth / Wandel Island, Antarctica, February 2006

Gabriel Rojo / Lemaire Channel Mountains, strait between the Antarctic Peninsula and Booth / Wandel Island, Antarctica, February 2006