Adélie Penguin | Life, Behaviour & Where to See Them

Pygoscelis adeliae

Adélie penguins are true Antarctic specialists. Along with the emperor penguin, they are the only two penguin species that breed exclusively on the Antarctic continent and its surrounding sea ice. First documented in the 1840’s by the French Antarctic expedition, named with affection by explorer Jules Dumont d’Urville after his beloved wife, Adélie. Though smaller than emperor penguins, don’t be fooled, for what they lack in height they make up for with attitude, known for their bold personalities. Almost comical in appearance they’re easy to spot with their distinct white eye rings that give them a wide-eyed permanent look of surprise.

Their tuxedo-like appearance is a form of camouflage known as countershading, which aids in protection against predators. From above their black backs blend in with the dark ocean, and from below their white bellies merge with the sunlit surface waters.

Size:  46 – 71 cm
Weight:  3.6 – 6 kg
Lifespan:  10 – 20 years
Dive Depth:  170m (Max Recorded)
Dive Duration:  5.6 minutes

Adélie penguins have been known to be adventurous with some sightings as far north as New Zealand. The most recent observation was in October 2024 when an individual was spotted on Petone beach, Wellington. The Adélie was rescued and later released into the Cook Strait, with the hope it will return to Antarctica.

For a detailed map of their range:

• IUCN Red List assessment of the Adélie penguin

Behaviour and social structure

Courtship behaviour and pair bonds

Courtship and nesting begin in mid-September to early October with males arriving at the breeding site first, pairs recognise each other through their vocalisations. Courtship displays are complex, combining both visual and auditory signals. Males perform an ecstatic display to claim the nest site, stretching their necks skywards, flapping their flippers and calling loudly. Receptive females respond with synchronised displays, often mirroring the male’s posture and engaging in mutual bowing. Once the bond is established, pairs continue to display together.

Incubation and parental care

Both parents share incubation duties over a 32 to 37 day period, alternating shifts every 11 to 14 days during the initial stages. Foraging trips can be extensive, with some individuals traveling up to 380 km. Upon returning, pairs often perform mutual ecstatic displays before switching incubation roles.

Chick rearing, crèches, and fledging

Chicks hatch in late December. During the early chick-rearing period, parents alternate incubation duties more frequently, every 2-3 days. At around 3 weeks old, chicks join other chicks forming a crèche. While still vulnerable, gathering in numbers offers protection from predators, and provides thermoregulatory benefits too. Both parents continue to forage at sea, returning to feed the chick in the crèche.

Fledging typically occurs between 41 and 64 days old. By mid-February, the chicks’ downy feathers have been replaced with waterproof feathers and they forage independently; coinciding with when Antarctic krill are most abundant.

Conservation status

The International Union for Conservation of Nature (IUCN) currently classifies the Adélie penguin as Least Concern, with the population thought to be roughly 10 million mature individuals (last assessed September 2020).

Although the population trend appears to be increasing, the species remains highly vulnerable to the impacts of climate change, particularly rising ocean temperatures. Their primary food source, Antarctic krill depend on sea ice for both feeding and breeding, declining krill populations are likely to alter the distribution and foraging behaviour of Adélie penguins.

Other potential threats include entanglement in discarded fishing nets and exposure to oil spills. While there are currently no records of Adélie penguins caught bycatch, they may be susceptible, especially with commercial fisheries operating in Antarctic waters. 

Where to see them in the wild

A true Antarctic species there is nowhere better to see the Adélie penguin then on a Secret Atlas expedition to the Antarctic Peninsula where they are abundant. Large colonies can be observed on a number of landing sites including, Paulet Island, Brown Bluff and Petermann Island. A zodiac cruise around the Fish Islands on the western side of the peninsula just north of the Antarctic Circle is another prime viewing spot for these entertaining and charismatic penguins.

When to book your trip

To witness the Adélie penguin’s entertaining antics, here’s a seasonal guide to help you plan your visit:

October - November:

Penguins return to shore and reunite with their partners. This is an excellent time to observe nest building, pebble thievery, courtship displays, and if you're lucky, mating. Colonies are alive with braying calls from ecstatic displays, set against pristine backdrops.

December - January: 

Most penguins are incubating their eggs, though some early hatchlings may occur. By late December the majority of chick’s hatch. Expect a hype of activity with parents tending to their chicks, alternating incubation duties, and performing mutual displays. It’s prime time for fluffy adorable penguin chicks.

February-March:

Chicks have significantly grown and are causing havoc, harassing their parents for food. Adults undergo their annual catastrophic moult, shedding old feathers rapidly over 3 weeks. By mid-February, chicks are fledging; their downy feathers are replaced for waterproof ones and they forage for themselves. Expect adults and juveniles to be sporting entertaining feather styles.

By March, most rookeries will be devoid of penguins as the breeding season ends and the penguins head back out to sea.