Emperor penguins are on the pathway to EXTINCTION: Satellite images reveal how shrinking sea ice is forcing birds into crowded groups - with potentially 'catastrophic' consequences

Emperor penguins are one of the Antarctic's most iconic animals – but these majestic birds are on the pathway to extinction.

For the first time, satellite images have captured the penguins' elusive moulting colonies, where they replace their feathers with new waterproof plumage.

Moulting is a particularly dangerous time for emperor penguins as they cannot enter the water to feed for several weeks while their new plumage regrows. 

The dramatic images reveal how shrinking sea ice is forcing the birds into smaller, increasingly crowded groups.

If the weakened ice breaks up early, this could spell disaster for the thousands of unprepared birds still trying to replace their feathers.

Dr Peter Fretwell, lead author of the study, warned of the potentially 'catastrophic' consequences for the species.  

'[This] almost certainly brings the extinction horizon closer, maybe by several decades,' he told the Daily Mail. 

'Although it will take more work and analysis to calculate exactly how much.' 

Each year, emperor penguins from the Ross Sea migrate as far as 620 miles (1,000 km) to Marie Byrd Land in search of stable sea ice to moult on.

'A penguin's feathers keep it waterproof and warm, and must be well oiled (using oil from a special gland at the base of the tail),' the British Antarctic Survey explains.

'Feathers become worn out and must be replaced every year. 

'During the three to four weeks of moulting, penguins come ashore.' 

Until now, how and where these moulting colonies form has remained a mystery.

By chance, researchers analysing satellite images spotted some distinctive brown patches along the coastline of Marie Byrd Land.

Since the timing lined up with when emperors were supposed to moult, they realised that these patches must be penguin moulting colonies.

Before 2022, the team identified hundreds of groups of moulting penguins along the coast of Marie Byrd Land. 

However, by 2022, that number was slashed to just 25, with penguins forced to clump together on the dwindling sea ice. 

Dr Fretwell said: 'It's possible that huge numbers of penguins perished after entering the Southern Ocean before they had replaced their waterproof feathers.

'If this has happened, the situation for emperors as a species is even worse than we thought.'

Between 2022 and 2024, Antarctic sea ice hit record lows as coverage in the study area fell from a 50–year average of 193,000 square miles (500,000 square km) to just 38,600 square miles (100,000 square km).

That left just 770 square miles (2,000 square km) of fast sea ice anchored to the coast to accommodate 40 per cent of the world's emperor penguins.

According to the experts, this is particularly worrying because emperor penguins are so slow breeding. 

Previous studies have shown that the species can live up to 20 years, but does not mate until the age of three or six.

Looking ahead, the researchers suggest the birds might start to look at new moulting sites.  

Dr Frewell explained: 'Early evidence suggests that they will look around for better moulting sites. 

'We know that they are adaptable, at least in where they go, but other sites are rare and the sea ice is less stable, so there is inherent risk in choosing a new site.'

In the coming weeks, a separate study is expected to release an analysis of penguin populations in the Ross Sea.

This will answer the key question of exactly how many adult penguins have been killed by the breakup of sea ice during moulting.

Dr Fretwell says that Antarctic scientists are 'waiting in trepidation' for the news.