A colony of Adélie penguins faces extinction after a colossal iceberg collided with their home - preventing them from feeding in the sea.

The iceberg, called B09B, which is the size of a small country and hit the area of Commonwealth Bay they inhabit in the Antarctic in 2011.

Researchers from the University of New South Wales counted the penguins at Cape Denison, a rocky point located at the head of the bay in 2013-2014, and published their conclusions in the journal Antarctic Science.

They were alarmed to find there were only 5,520 pairs of the penguin, compared to an estimated 100,000 birds in the area a century ago.

The team also found many of the remaining penguins were "docile" and "not hatching eggs".

The study noted: "A colony on the east cost of the on the eastern fringe of Commonwealth Bay, just 8km, from the fast ice edge was thriving, indicating the arrival of B09B and fast ice expansion."

The team observed the effects of the iceberg and found it had caused sea ice to expand by up to 60 kilometers, meaning the penguin colony now have to travel almost 120 kilometers to get to the ice edge to feed in the sea.

Whether the birds are finding cracks in the ice or making their way to the edge of the ice, the team said they saw hundreds of abandoned eggs and frozen chick carcasses on the ground, according to Russia Today.