How to Identify Northern Gannet Feathers

What Northern Gannet's Feathers Look Like

The Northern Gannet is a large, streamlined seabird, and adult feathers show a clean, striking pattern that's hard to mistake. Body feathers are pure white overall, with a distinctive warm golden-buff wash confined to the head and upper neck, a white feather with a soft yellowish-buff tinge, if from the head/neck region, is a strong species clue. Flight feathers stand in sharp contrast: the outer primaries are solidly black, clearly demarcated against the white coverts and body, so a black, elongated flight feather found alongside white body feathers of similar large size fits well. These flight feathers are substantial, 22-30 cm, reflecting the bird's large size and powerful plunge-diving flight. Tail feathers are white, pointed rather than rounded at the tip (unusual among seabirds), 15-19 cm, with the central pair often slightly longer, creating a subtly wedge-shaped tail. Juvenile and immature gannets look quite different: their feathers are dark grayish-brown liberally speckled with small white spots, gradually molting toward the clean adult pattern over about four to five years, so a heavily speckled dark-brown-and-white feather can still belong to this species at an immature age.

Step-by-Step: Is This Feather From a Northern Gannet?

• Check for a golden-buff wash on white feathers, particularly if from the head/neck area.
• Look for solidly black flight feathers paired with white body feathers of similar large scale.
• Measure size. Large flight feathers (22-30 cm) and a substantial overall feather size fit this big seabird.
• Check the tail feather tip shape. A pointed, rather than rounded or squared, tip is distinctive.
• If the feather is dark brown with white speckling, consider an immature gannet rather than ruling out the species.
• Consider location: coastal cliffs, offshore waters, or beaches in the North Atlantic support this ID.

Similar Species & How to Tell Them Apart

Cape Gannet and Australasian Gannet, close relatives found in other oceans, are extremely similar in feather pattern, distinguished mainly by subtle differences in the extent of black on the flight feathers and by range, practically speaking, location is the most useful separator since the three species don't naturally overlap. Herring Gull and other large white gulls can show some superficial similarity in overall white-and-gray tone, but lack the sharply solid black flight feathers and golden head wash, and gull tail feathers are squared rather than pointed. Brown Booby and other booby relatives have brown body feathers with a white belly, a quite different pattern from the gannet's overwhelmingly white body with black wingtips only. The gannet's large size, pointed tail, golden-tinged white head, and cleanly demarcated black wingtips make adults fairly straightforward to identify.

Where & When You'll Find Them

Northern Gannets breed in large, dense colonies on cliffs and rocky islands around the North Atlantic (notably around the British Isles, Iceland, and eastern Canada), spending the rest of the year over open ocean, sometimes well offshore. Feathers are most reliably found near breeding colonies during the spring-to-summer nesting season, or washed ashore on Atlantic-facing beaches, especially after storms, at any time of year. Molt in adults is protracted and occurs mainly outside the breeding season, from late summer into winter, so beach-found feathers year-round are not unusual for this abundant colonial seabird.