Birds Active during the day

Brown Booby

Sula leucogaster

iNaturalist eBird Wikipedia

A master of the tropical shoreline, the Brown Booby is a striking plunge-diver known for its chocolate-brown plumage and bold white belly. Whether perched on a sun-drenched pier or diving into turquoise waters, this charismatic seabird is a favorite for coastal observers.

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Quick Identification

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Size

Length: 64–80 cm (25–31 in); Wingspan: 132–150 cm (52–59 in); Weight: 700–1,500 g (1.5–3.3 lb)

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Colors

Dark chocolate brown head, neck, and upperparts; stark white lower breast and belly; yellow or greenish-yellow feet and legs; pale yellow bill.

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Key Features

Sharp contrast line between brown neck and white belly
Long, pointed yellow bill
Large, webbed yellow feet
Slender, cigar-shaped body with long pointed tail

When You’ll See Them

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Activity pattern Active during the day

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Peak hours 6-10 AM, 3-6 PM

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Season Year-round in tropical regions

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Diet Carnivorous; primarily eats flying fish, squid, and small schooling fish like mullet or anchovies caught by plunge-diving from 10-30 meters.

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Habitat Coastal waters, offshore islands, coral cays, and man-made structures like jetties or buoys.

public Geographic range

Where Does the Brown Booby Live?

Native to the tropical and subtropical regions of the world's oceans, the Brown Booby has a massive pantropical distribution. They are found extensively throughout the Caribbean, the Gulf of Mexico, and the tropical Atlantic, as well as across the Pacific and Indian Oceans. In the United States, they are most common in the Florida Keys and Hawaii, though they are increasingly spotted as vagrants along the California and Gulf coasts as ocean temperatures shift.

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8 Countries

160M km² Range

Least Concern Conservation

US United States MX Mexico BR Brazil AU Australia JP Japan PH Philippines ID Indonesia CO Colombia

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iNaturalist / Verified observation data

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Behavior

The Brown Booby is a gregarious and highly social seabird, known for its incredible aerial agility and cooperative foraging. Unlike some of its relatives that hunt far out at sea, the Brown Booby often stays closer to shore, cruising at low altitudes over the waves before performing spectacular plunge-dives to catch prey. They are often seen in small groups, sometimes following fishing boats or even hitching a ride on the bows of ships.

On land, they are surprisingly bold and may show little fear of humans, particularly in areas where they are accustomed to boat traffic. They choose to roost on solid structures like piers, buoys, and rocky outcrops rather than floating on the water's surface. During the breeding season, they nest on the ground in colonies, where they perform elaborate courtship displays involving bill-pointing and sky-pointing to attract mates.

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Camera Tips

Capturing a Brown Booby on a trail camera requires a coastal approach. If you have a property with a dock, pier, or a view of offshore pilings, focus your camera on these potential roosting sites. Brown Boobies prefer elevated, solid objects for resting, so mounting your camera 3-5 feet above a flat surface like a dock railing or a dedicated bird platform is ideal.

Because the sun reflects intensely off the water, use a camera with high dynamic range (HDR) settings to avoid blowing out the white plumage of the bird's belly. Point your camera away from the direct path of the sun (ideally North or South) to minimize glare. If your camera allows for shutter speed adjustments, use a fast setting to capture the crisp detail of their wings during takeoff or landing.

While you can't easily 'bait' a seabird with traditional feeders, you can attract them by providing a stable, clean roosting spot. A simple wooden platform or even a large, stationary buoy within camera range can act as a natural lure. Make sure your camera is triggered by motion and set to take a burst of 3-5 photos to capture their interesting grooming behaviors and social interactions.

Similar Species

Species that look similar or are commonly confused with Brown Booby.

Blue-footed Booby

Has bright blue feet and a mottled brown-and-white head, unlike the solid brown head of the Brown Booby.

Masked Booby

Much whiter overall with a dark 'mask' around the face and a bright yellow bill.

Red-footed Booby

Smaller with red feet; can have various color morphs but lacks the crisp 'waistline' contrast of the Brown Booby.

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Frequently Asked Questions

Brown Boobies are strictly diurnal, meaning they are active during daylight hours. They are most frequently seen foraging at dawn and in the late afternoon when fish are closer to the surface, and they spend much of the midday heat roosting on buoys or rocks.

You can only attract Brown Boobies if your 'backyard' is on the coast or includes a private dock. They are not attracted to birdseed or suet; instead, they seek out stable, elevated perches near the water. Providing a clear, flat railing or a dedicated roosting platform on a pier is the best way to encourage them to visit.

Their diet consists almost entirely of small fish and squid. They are especially fond of flying fish, which they sometimes catch mid-air, but they usually hunt by diving headfirst into the water to grab schooling fish just below the surface.

Only in very specific coastal suburban environments, such as canal-front homes or marina communities in tropical climates like Florida or Hawaii. They do not venture inland and are never found in typical land-locked suburban backyards.

The easiest way to distinguish them is by their plumage and feet. The Brown Booby has a solid chocolate-brown head and neck that stops abruptly at the white breast, and yellow feet. The Blue-footed Booby has mottled brown and white plumage on its head and neck, and distinctive bright blue feet.

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