White-fronted tern: where and when to see them

The white-fronted tern is a slender coastal seabird closely associated with New Zealand, where it is the most widespread breeding tern. Adults have pale gray upperparts, white underparts, a black cap and a narrow white forehead above the bill. Long tail streamers contribute to its elegant flight. Colonies can occupy exposed beaches, shingle spits and rocky ground, making eggs and chicks vulnerable to disturbance, predators and unusually high tides.

Size

35-43 cm long; wingspan 79-82 cm

Weight

120-160 g

Lifespan

Not reliably established

Status

Least Concern

White-fronted terns search for fish in buoyant flight, often hovering briefly before plunging toward the surface. They may gather into feeding flocks when prey is concentrated by currents or other predators. Courtship includes fish presentation, and nesting birds defend colonies with noisy aerial passes. After breeding, many disperse along coasts, with some reaching southeastern Australia, while others remain within New Zealand waters throughout the year as residents. They are highly social birds, forming large, noisy colonies for breeding and often feeding in cooperative flocks. During courtship, males perform aerial displays and present fish to potential mates as a key part of pair-bonding.

• Its Māori name is tara.
• Some birds disperse from New Zealand to southeastern Australia after breeding.
• Courtship feeding involves a male presenting a fish to a female.
• Pairs usually place their eggs in a simple scrape rather than a built nest.

Spring and summer, broadly October through February, offer opportunities to observe breeding activity in New Zealand from permitted viewpoints. Birds also occur outside this period, although dispersal changes local numbers. Colony positions and nesting success vary, so follow current access notices rather than old site descriptions. Prime viewing for active colonies is during the spring and summer breeding season, when thousands can congregate at favored sites. During the non-breeding season, smaller groups or individual birds can still be sighted along the coast.

Coastal waters, harbors, estuaries and exposed shorelines provide feeding and resting habitat. Colonies occur on sand, shingle, shell banks and rocky islands, usually near productive marine waters. Roosts and nesting areas can shift when storms or predators make previous sites unsuitable. They prefer undisturbed sites for breeding, often choosing offshore islands or remote stretches of coast. Nests are shallow scrapes in sand or shingle, sometimes lined with small debris, offering little protection from the elements.

Small schooling fish are the main food, especially species available close to the surface. Some marine invertebrates are also taken. Adults carry fish individually to mates or chicks, making repeated food deliveries an informative behavior to watch from outside colony boundaries. Their diet primarily consists of anchovies, pilchards, and other small pelagic fish, which they catch by plunge-diving from heights up to 10 meters. Opportunistic feeding also includes krill and marine worms when available.

Common name

White-fronted tern

Scientific name

Sterna striata

Animal group

Birds

Size

35-43 cm long; wingspan 79-82 cm

Weight

120-160 g

Lifespan

Not reliably established

Status

Least Concern

Identification

Its black bill, narrow white forehead and long tail distinguish it from the much larger red-billed Caspian tern and the smaller black-fronted tern. Juveniles are distinguished by mottled brown plumage on their back and crown, gradually acquiring adult coloration over their first year. In flight, their long, pointed wings and forked tail are distinctive characteristics.