Birds diurnal

Bristle-thighed Curlew

Numenius tahitiensis

The Bristle-thighed Curlew is a legendary long-distance migrant that bridges the gap between the Alaskan wilderness and tropical Pacific paradises. Known for its remarkable tool-using abilities and distinctive whistling call, this rare shorebird is a true prize for any backyard observer in the islands.

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Quick Identification

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Size

Length: 40–44 cm (16–17 in); Wingspan: 82–90 cm (32–35 in); Weight: 350–550 g (12–19 oz)

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Colors

Buffy-brown overall with dark streaking; distinctive bright cinnamon-buff rump and tail; pale underparts with light spotting on the flanks.

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Key Features

Long downward-curved (decurved) bill
Buffy-orange rump and tail
Stiff hair-like feathers at the base of the legs
Bold head stripes with a dark crown and eyeline

When You’ll See Them

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Activity pattern diurnal

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Peak hours 6-9 AM, 4-7 PM

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Season September-April (Wintering islands), May-August (Alaska breeding grounds)

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Diet A generalist feeder: consumes insects and berries in the Arctic; switches to crabs, mollusks, lizards, and seabird eggs on Pacific islands.

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Habitat Summer: Hilly Alaskan tundra. Winter: Coastal beaches, coral atolls, and occasionally grassy lawns or airports on Pacific islands.

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Behavior

The Bristle-thighed Curlew is a world-class traveler, renowned for its incredible non-stop migration from the Alaskan tundra to remote Pacific islands. Unlike many shorebirds, they are remarkably bold and curious around humans, likely due to their evolution on isolated islands with few terrestrial predators. They are social birds, often found in small groups along shorelines, though they remain fiercely protective of their space when foraging.

One of the most fascinating aspects of their behavior is their use of tools. They are one of the few bird species observed using rocks to break open the thick shells of albatross eggs. During their winter stay in the tropics, they undergo a unique flightless molt, losing all their primary feathers at once. This leaves them grounded and vulnerable for several weeks, making them highly dependent on the safety of undisturbed beach and upland habitats.

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Camera Tips

To capture the Bristle-thighed Curlew on a trail camera, placement is everything. These birds are terrestrial foragers, so you should position your camera very low to the ground—ideally between 6 and 10 inches high. On Pacific islands, look for 'flat' areas like coral rubble paths, beach margins, or short-grass lawns where they hunt for crabs. Setting the camera near a known freshwater source or a tide pool can significantly increase your chances of a sighting.

Because these birds are active during the day, focus on locations with good natural lighting. Avoid placing the camera facing directly east or west to prevent lens flare during their peak activity hours at dawn and dusk. A north-facing orientation will provide the most even lighting for their intricate feather patterns. If you are in Hawaii or a similar wintering spot, look for areas where seabirds are nesting; curlews are often drawn to these sites to scavenge for dropped food or eggs.

Since these birds are surprisingly tame, you can often set your PIR (Passive Infrared) sensitivity to 'Medium' or 'High' without worrying about them being spooked by the camera's presence. Use a fast shutter speed or a 'Burst' mode to capture their rapid movements when they are striking at prey or using rocks as tools. If your camera supports video, 15-20 second clips are ideal for documenting their unique 'tail-wagging' behavior and whistling calls.

Similar Species

Species that look similar or are commonly confused with Bristle-thighed Curlew.

Whimbrel

The Whimbrel lacks the bright orange rump and the hair-like thigh feathers of the Bristle-thighed Curlew.

Long-billed Curlew

Significantly larger with a much longer bill and cinnamon wing linings, lacking the bold head stripes of the Bristle-thighed.

Frequently Asked Questions

They are diurnal birds, meaning they are most active during daylight. Their peak foraging times usually occur in the early morning and late afternoon when temperatures are cooler and coastal prey like crabs are easier to find.

If you live in a coastal area of Hawaii or the South Pacific, maintaining a natural, chemical-free lawn can attract them, as they forage for insects and lizards. They prefer open spaces with clear sightlines to stay safe from roaming pets.

Their diet is highly adaptable. In the Arctic, they eat berries and insects. In the tropics, they eat crabs, snails, and spiders. They are also famous for using rocks to crack open eggs, making them one of the world's few tool-using birds.

They are rarely found in inland suburban areas. However, they are frequently spotted on coastal golf courses, airports, and beach-front lawns in Hawaii and other Pacific islands during the winter months.

The easiest way is to look at the rump. The Bristle-thighed Curlew has a bright, unstreaked cinnamon-orange rump and tail, while the Whimbrel has a much darker, streaked rump. The Curlew's call is also a more melodic 'tee-u-eet' whistle.

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