Antarctic Tern vs Great Crested Tern

In short

The Great Crested Tern (Thalasseus bergii) is larger and more robust than the Antarctic Tern (Sterna vittata), with a distinctive shaggy black crest. In contrast, the Antarctic Tern has a more delicate structure and lacks the crest. Both species belong to the same family, but their size and head markings are key differentiators.

Identification tips

• Look for the shaggy black crest on the Great Crested Tern, absent in the Antarctic Tern.
• Note the size difference: Great Crested Tern is larger and bulkier.
• Consider the habitat: Antarctic Terns are found in colder southern regions, while Great Crested Terns prefer warmer coastal areas.
• Be aware of plumage variations in Antarctic Terns due to different populations.

Size

The Great Crested Tern is noticeably larger and bulkier than the Antarctic Tern.

Plumage

The Great Crested Tern has a prominent shaggy black crest on its head, while the Antarctic Tern lacks this feature. The Antarctic Tern's plumage can vary among populations, but it generally appears more delicate without the pronounced crest.

Behaviour

Both species exhibit typical tern behavior, such as diving for fish, but the Great Crested Tern's larger size may make its flight appear more powerful.

Habitat

The Antarctic Tern is circumpolar and can be found in various southern oceans, with some populations migrating to southern South Africa. The Great Crested Tern is more widespread in tropical and subtropical coastal regions.