Birds Active during the day

Arctic Tern

Sterna paradisaea

iNaturalist eBird Wikipedia

The world's greatest traveler, the Arctic Tern follows the sun from the top of the world to the bottom and back again. Witness the bird that sees two summers every year.

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0 Habitats

Quick Identification

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Size

Length: 28–39 cm (11–15 in); Wingspan: 65–75 cm (26–30 in); Weight: 90–120 g (3.2–4.2 oz)

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Colors

Pale grey upperparts and underparts, white rump, black cap/nape, and bright blood-red bill and legs. In winter, the forehead turns white.

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Key Features

Deeply forked 'swallow-like' tail with long outer streamers
Solid blood-red bill without a black tip
Short legs and a translucent appearance to primary wing feathers
Gull-like shape but much more slender and agile

When You’ll See Them

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Activity pattern Active during the day

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Peak hours 5 AM - 9 AM and 4 PM - 8 PM

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Season May-August (Northern Hemisphere)

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Diet Primarily small fish (like sand eels, herring, and capelin) and crustaceans. They also catch insects during the breeding season while inland.

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Habitat Coastal islands, rocky beaches, and tundra during breeding; open ocean and pack ice during migration and winter.

public Geographic range

Where Does the Arctic Tern Live?

Native to the northernmost latitudes of the planet, the Arctic Tern breeds across the Arctic and sub-Arctic regions of North America, Europe, and Asia. You can find them nesting from the icy coasts of Greenland and Iceland to the remote reaches of Alaska, Canada, and Scandinavia. Once the breeding season ends, they embark on a staggering journey across the Atlantic and Pacific oceans to reach the Antarctic coast, making them a truly global species that touches nearly every continent's coastline during its migration.

Basemap © OpenStreetMap contributors

11 Countries

2.0M km² Range

Least Concern Conservation

CA Canada US United States Greenland Iceland NO Norway Russia GB United Kingdom NL Netherlands CL Chile AR Argentina ZA South Africa

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iNaturalist / Verified observation data

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Behavior

The Arctic Tern is the ultimate endurance athlete of the bird world. Known for their spirited and protective nature, these birds are fiercely territorial during the nesting season. If you venture too close to a colony, expect a 'dive-bombing' welcome as they swoop down to peck at the heads of intruders, including humans and much larger predators like foxes. Their social structure is colonial, often nesting in high densities to provide collective defense against egg-thieves.

In the air, they are masters of grace, frequently seen hovering over the water's surface before performing a shallow plunge-dive to snatch up prey. Unlike many other birds, they spend the vast majority of their lives in flight or on the water, rarely walking due to their exceptionally short legs. Their interactions with humans are mostly limited to coastal encounters, where they are often admired for their incredible tenacity and the sheer scale of their annual journeys.

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Camera Tips

Capturing the Arctic Tern on camera requires a strategy focused on their high-speed movement and coastal habitat. If you live near a shoreline or breeding colony, place your camera on a low-profile tripod or a sturdy rock facing a known 'loafing' spot—these are flat rocks or sandbars where the birds rest between fishing trips. Because they have very short legs, an eye-level or slightly lower angle provides the most dramatic and intimate perspective of their sleek profiles.

Since these birds are incredibly fast flyers, your camera's trigger speed is critical. Set your AI-powered camera to its highest sensitivity and, if possible, use a 'burst' or 'high-speed' photo mode to catch the moment they hover or dive. For backyard setups near the coast, bird baths are rarely effective for this species; instead, try to position your lens toward the water's edge where they may dip their bills or bathe in the shallows. Direct sunlight during the 'golden hours' is your best friend to highlight the translucent quality of their wing feathers.

Always prioritize bird safety and personal protection. When setting up near nesting sites, do so quickly and keep your distance, as Arctic Terns will not hesitate to strike your equipment (or your head!) if they feel threatened. Using a wide-angle lens can capture the scale of a colony, while a telephoto lens is better for candid behavior without disturbing their natural rhythm. In the winter months, these birds are strictly pelagic, so shore-based cameras are only effective during the spring and summer breeding windows.

Similar Species

Species that look similar or are commonly confused with Arctic Tern.

Common Tern

The Common Tern has a black-tipped orange-red bill and longer legs, whereas the Arctic Tern's bill is entirely blood-red.

Roseate Tern

Much paler overall with very long tail streamers and a bill that is mostly black for much of the year.

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Frequently Asked Questions

Arctic Terns are primarily diurnal, meaning they are active during the day. They are most vigorous during the early morning and late afternoon when fish are closer to the water's surface, making it the best time for hunting and social displays.

Arctic Terns are difficult to attract to a traditional backyard unless you live directly on a coastline or near a salt marsh. They do not visit feeders. The best way to 'attract' them is to ensure a healthy local ecosystem with clean water and minimal disturbance on coastal nesting beaches.

Their diet consists almost entirely of small forage fish and marine invertebrates. During the breeding season, they may also catch dragonflies and other large insects over freshwater pools or tundra.

They are rarely seen in typical suburban neighborhoods. However, in coastal towns in high-latitude regions like Alaska or Scotland, they may nest on gravel rooftops or in parklands near the sea.

Look at the bill and legs: Arctic Terns have a solid red bill and very short legs, while Common Terns usually have a black-tipped bill and longer legs. In flight, the Arctic Tern's tail is longer and its wings appear more translucent when backlit.

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