African Penguin Facts & Biology

Discover how a pair of endangered seabirds established a mainland colony in Simon's Town in 1982.

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African Penguin Biological Profile

Scientific Name Spheniscus demersus
Common Names African Penguin, Jackass Penguin
Colony Founded 1982 (First 2 Breeding Pairs)
Current Population ~2,100 Birds at Boulders
Average Height / Weight 60–70 cm / 2.2–3.5 kg
Primary Diet Pilchards (Sardines) & Anchovies

Why Are There Penguins at Boulders Beach?

Historically, African Penguins nested on offshore islands to avoid terrestrial predators like leopards and wild dogs. In 1982, two breeding pairs established a nest on the mainland at Boulders Beach. The site offered protection from heavy sea swells due to ancient granite boulders and abundant anchovies in False Bay following commercial fishing restrictions.

Because human settlements surrounding Simon's Town provided a barrier against large land predators, the colony expanded rapidly from two pairs to over 2,000 birds today.

Why Are There Penguins at Boulders Beach?
Photo by Joseph Phillips / Pexels

Why Are They Called 'Jackass Penguins'?

The African Penguin is famous for making a loud, donkey-like braying noise to communicate with mates and establish territory boundaries. This loud vocal call earned them the colloquial name 'Jackass Penguin'.

Each penguin has a unique pattern of black spots on its white chest, similar to a human fingerprint. Marine biologists use these spot patterns to identify individual birds without needing leg bands.

Penguin Biology FAQs

The penguins at Boulders Beach are African Penguins (Spheniscus demersus), the only penguin species that breeds on the African continent.

Yes. The African Penguin is classified as Endangered on the IUCN Red List due to historical egg harvesting, guano scraping, oil spills, and commercial fish depletion.

African Penguins can swim at speeds of up to 20 km/h (12 mph) when chasing fish or escaping predators like Cape fur seals and sharks.

Alex Vance

Written by Alex Vance

Expat travel writer and marine wildlife enthusiast living in Simon's Town. Specializing in South Peninsula coastal travel, penguin conservation, and insider visitor tips.