Caspian Tern
Caspian Tern
Caspian Tern
Caspian Tern
Caspian Tern

Caspian Tern

Hydroprogne caspia

Call Joost van Bruggen

Mass

~660 g

Habitat

Wetlands and marshes

Diet

Fish and aquatic animals

How to recognize it

Largest tern, bigger and bulkier than the common species
Thick red-orange bill with a small black tip
White head with black cap; in winter, some white streaking on the forehead
Slow wingbeats; tail only slightly forked; loud heron-like croak

The Caspian tern looks bold and solid in the air, with a strong red bill and a slower, heavier wingbeat than most terns. Its tail is only slightly forked, which gives the whole shape a calmer, less sharp look.

It often gathers in colonies and may range far from them when feeding. The voice is rough and loud, more like a heron’s croak than a typical tern call, so it can announce itself before it comes into view.

For breeding, it chooses sandy coasts and islands, and during migration it may turn up over inland waters too. It mainly takes fish by plunging from above, but will also eat large insects, eggs and young of other nesting species, and even rodents.

Sources