An AMLR scientist takes a break from work at the Seal Island field station.

A colony of chinstrap penguins. Some animals are tagged and marked for research purposes.

Chinstrap penguins at Seal Island in 1992.

A cliffside colony of chinstrap penguins at Seal Island.

An adult chinstrap penguin with two chicks.

A chinstrap penguin colony on the rocky shoreline of Seal Island.

An adult chinstrap penguin with two chicks.

Patches of molting skin are visible on the nose of this female elephant seal.

Small grounded icebergs, or "growlers".

A small aircraft doing aerial surveys in South Georgia Island.

An AMLR small boat makes its way toward the Seal Island field station from the nearby R/V Surveyor.

A biologist counts his way through a chinstrap penguin colony on Seal Island.

Small, floating iceberg, or "growler".

The American and Japanese flags are flown at the Seal Island field station.

Kevin Pietrzak and McKenzie Mudge collecting seal scats on Livingston Island.

An AMLR scientist sets up the Seal Island field station's radio antenna.

Left to Right: John Bengtson, John Jansen, Don Croll, M. Mori, and Peter Boveng at the Seal Island field station in 1991.

An Antarctic fur seal, with warm winter coat.

AMLR researchers Drs. Rennie Holt and Roger Hewitt at Seal Island.

The Seal Island research team, with Dr. Mike Goebel (far right), 1991.

Volcanic islets off Seal Island.

The penguin observation blind, where AMLR scientists can watch penguins without disturbing their activities, was built in 1989.

An Antarctic fur seal at Cape Shirreff, Livingston Island.

A yearling Antarctic fur seal.

AMLR scientists set up a hidden scale that will measure penguins as they walk over it or sit on it.

An AMLR biologist buries a scale in a penguin colony on Seal Island.

A fur seal snoozes with a penguin colony in the distance.

A fur seal mother with her newborn pup.

A giant petrel defends its meal from an intruder in a pose referred to by some scientists as the "sealmaster" posture.

A southern giant petrel uses the posture known as the "sealmaster" posture - wings outstretched, tail raise and beak pointed at the enemy - to guard its meal from an intruder.

Antarctic fur seal giving birth.

A fur seal with a flipper tag and radio transmitter.

A fur seal with a flipper tag, and her newborn pup.

A tagged Antarctic fur seal with her newborn pup.

Adelie penguins rest on the snow on Livingston Island.

A nursing Antarctic fur seal pup .

A resting Weddell seal.

Antarctic fur seal mom and pup.

An impressive view of a leopard seal's teeth, Cape Shirreff, Livingston Island. Leopard seals are the top predators in the Antarctic, aside from humans. They regularly include penguins in their diet.

Male fur seals, basking on the beach.

A fur seal and her pup. Their extraordinarily long whiskers help them sense prey and navigate underwater.

A calling fur seal.

A fur seal mother and nursing pup.

An AMLR biologist seeks a better view at a Seal Island penguin colony.

Tabular icebergs in the Southern Ocean.

A chinstrap penguin colony near a glacier at Seal Island.

A pair of chinstrap penguins prior to copulation.

A chinstrap penguin guards its nest after a snowstorm.

A large chinstrap penguin colony at Seal Island.

A chinstrap penguin rookery. Some species of penguins form rookeries of millions of individuals. There are currently around 7 million pairs of chinstrap penguins in Antarctica, but their numbers are declining.