Birds diurnal

Bonaparte's Gull

Chroicocephalus philadelphia

The Bonaparte's Gull is the elegant acrobat of the gull family, known for its striking black hood and unique habit of nesting in trees. A graceful visitor to lakes and coasts, it brings a touch of wild northern beauty to any backyard waterway.

0 Sightings

0 Habitats

Quick Identification

straighten

Size

Length: 28-38 cm (11-15 in); Wingspan: 76-84 cm (30-33 in); Weight: 170-230 g (6-8.1 oz)

palette

Colors

Pale gray wings and back with white underparts. Breeding adults feature a striking slaty-black hood; winter adults have a white head with a characteristic dark ear spot. Legs are a vibrant pink to reddish-orange.

visibility

Key Features

Slaty-black hood (breeding) or dark ear spot (winter)
Thin, needle-like black bill
White leading edge on outer wings visible in flight
Bright pinkish-red legs and feet

When You’ll See Them

schedule

Activity pattern diurnal

brightness_5

Peak hours 7 AM - 10 AM and 4 PM - 7 PM

calendar_month

Season April-May and September-November

restaurant

Diet During the summer, they are largely insectivorous, catching flies and beetles in mid-air. During migration and winter, they transition to small fish, crustaceans, and marine worms snatched from the water's surface.

park

Habitat Lakes, rivers, and coastal bays during migration; nests in coniferous forests near wetlands.

bar_chart
Loading activity data...

Behavior

Unlike many of their larger, more aggressive cousins, Bonaparte's Gulls are known for their dainty and graceful movements. They possess a buoyant, almost tern-like flight pattern, often dipping down to the water's surface to snatch prey rather than diving deep. They are highly social birds, frequently seen in loose flocks during migration, often mixing with other small gulls or terns near rich feeding grounds.

One of the most remarkable aspects of their behavior is their nesting habit. While almost all other gull species nest on the ground, the Bonaparte's Gull is an arboreal nester, building its home in coniferous trees within the northern boreal forests. In more suburban or coastal settings, they are less likely to scavenge for human trash, preferring to stick to natural food sources in lakes, rivers, and estuaries.

photo_camera EverydayEarth exclusive

Camera Tips

To capture the Bonaparte's Gull on camera, location is everything. Since these gulls rarely visit traditional bird feeders, you should position your camera near the water's edge. Docks, piers, or flat rocks along a shoreline are ideal mounting points. Set your camera at a low angle—roughly 1 to 2 feet off the ground—to capture their delicate leg coloring and the intricate details of their plumage. If you have a backyard pond or live on a lakefront, placing the camera near a shallow 'splash zone' where they might bathe can result in spectacular action shots.

Because these birds are remarkably fast and their flight is erratic, you must prioritize a high shutter speed or a 'burst mode' setting on your AI camera. A trigger speed of 0.2 seconds or faster is recommended to catch them as they dip toward the water. If your camera allows for sensitivity adjustments, set it to 'High' to ensure the motion of a small bird is detected from a distance. If you are using a trail camera with a flash, ensure it is an 'invisible' or 'black' IR flash to avoid startling the birds during the low-light hours of dawn and dusk when they are most active.

While you won't lure them with seeds, you can increase your chances by monitoring local weather patterns. Bonaparte's Gulls often congregate in larger numbers just before or after a storm front. During migration, look for 'fallouts' where dozens of birds may rest on a single beach or dock. Placing a camera near a natural congregation point, like a school of small baitfish or an area with high insect activity over the water, will provide the best results. In the winter, focus on ice-free patches of water where they are forced to congregate to feed.

Similar Species

Species that look similar or are commonly confused with Bonaparte's Gull.

Franklin's Gull

Franklin's has a thicker bill, a more prominent white eye-ring, and different black patterns on the wing tips.

Little Gull

The Little Gull is even smaller and features strikingly dark underwings, which contrast with the Bonaparte's pale underwings.

Ring-billed Gull

Much larger with a yellow bill featuring a black ring; lacks the black hood of the breeding Bonaparte's.

Frequently Asked Questions

Bonaparte's Gulls are strictly diurnal, meaning they are active during daylight hours. They are most frequently seen foraging in the early morning shortly after sunrise and again in the late afternoon when insect activity over the water is at its peak.

These gulls aren't attracted to seeds or suet. To see them, you need a water feature. If you live on a lake or coast, maintaining a clear view of a dock or a shoreline 'loafing' area is the best way to attract them. They are occasionally drawn to large, shallow birdbaths near the shore.

Their diet is quite varied; they eat many flying insects like ants and beetles during the breeding season. In the winter, they switch to small fish, shrimp, and other aquatic invertebrates found near the surface of the water.

They are common in suburban areas only if those areas are adjacent to significant bodies of water like large lakes, rivers, or coastal bays. They are migratory, so you are most likely to see them passing through in the spring and fall.

The easiest way to tell them apart is by their wing tips. In flight, Bonaparte's Gulls show a large white wedge on the leading edge of the outer wing, whereas Franklin's Gulls have more black on the wing tips with distinct white 'windows' or spots.

Record Bonaparte's Gull at your habitat

Connect a camera to start building your own species record — AI identifies every visitor automatically.

Join free Identify a photo