Bryan and Cherry Alexander / Chinstrap penguin (Pygoscelis antarctica) on rocks with snow covered rocks, Half Moon Island, South Shetland Islands, Antarctica.

Andy Trowbridge / Fishing boat off the West Coast of Norway, seen from Runde Island at dusk with a half moon. Runde Island, Norway, July 2008

David Tipling / Chinstrap penguins (Pygoscelis antarcticus) gathered around basalt rock formation in order to breed, Half Moon Island, Antarctica, November

David Tipling / Chinstrap Penguin (Pygoscelis antarctica) calling in courtship display, Half Moon Island, Antarctica

David Tipling / Gentoo Penguin (Pygoscelis papua) guarding nest from Brown Skua (Stercorarius antarcticus), Half Moon Island, Antarctica, November

David Tipling / Gentoo Penguin (Pygoscelis papua) pair, Half Moon Island, Antarctica, November

David Tipling / Gentoo Penguin (Pygoscelis papua) displaying, Half Moon Island, Antarctica, November

David Tipling / Gentoo Penguin (Pygoscelis papua) mating, Half Moon Island, Antarctica, November

Konrad Wothe / Antarctic Fur Seal (Arctocephalus gazella) Half Moon Island, South Shetland Island, Antarctica. February.

Rick Tomlinson / SY "Adele", 180 foot Hoek Design, motoring past Half Moon Island, Half Moon Bay, Antarctica, January 2007 Non editorial uses must be cleared individually.

Kevin Schafer / Kelp Gull (Larus dominicanus) on nest, Half Moon Island, South Shetland Islands, Antarctica

Brent Stephenson / Chinstrap Penguin (Pygoscelis antarctica) rookery in late summer. Half Moon Island, Antarctic Peninsula, Antarctica, January.