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The red-billed tropicbird (Phaethon aethereus) is one of the most elegant Galapagos birds: a brilliant red bill, a black eye mask and two long white tail streamers trailing behind it in flight. A true ocean wanderer — sailors knew it as the boatswain bird — it comes to land only to nest on the cliffs. Here is what it is, where it lives, and the islands where you can realistically see it from land.
Red-billed tropicbird at a glance
- Scientific name: Phaethon aethereus
- Tail streamers: two long white plumes, roughly 45-55 cm on their own
- Feeding: plunge-dives for squid and small fish
- On land: can barely walk — legs set far back on the body
- Nesting: a single egg in a cliff crevice, year-round
- Where: sea cliffs and offshore islands such as South Plaza and Genovesa
What is it?
The red-billed tropicbird (Phaethon aethereus) is a tropical seabird with mostly white plumage, a bold black eye mask, fine black barring on the back, a vivid red bill and two very long central tail streamers, roughly 45 to 55 cm on their own. Males tend to have slightly longer streamers than females. As a tropicbird, it is built entirely for life over the sea. Not sure how to fit this into a trip? Send us your dates and we’ll map out the islands for you.
A master plunge-diver
The red-billed tropicbird galapagos birds feed by plunge-diving: they hover high over the water, then drop vertically to snatch squid and small fish just below the surface. When they rest on the sea they cock that long tail upright to keep the streamers dry. Their legs sit so far back on the body that walking is almost impossible — on land they simply shuffle to their nest.
Courtship, nesting and the frigatebird problem
Courting pairs put on a show, performing synchronised aerial acrobatics high above the cliffs. They nest in sheltered rock crevices, laying a single egg, and in the Galapagos they can breed year-round. Life is not all easy, though: frigatebirds harass them in mid-air and will even grab the long tail to make them drop their catch. These are some of the more dramatic red-billed tropicbird facts.
Where to see it
Look up at the cliffs and out to sea:
- South Plaza Island — dramatic cliffs where they dart at close range.
- Genovesa (Tower Island) — among its famous seabird colonies.
- Punta Pitt (San Cristobal) and Daphne Major — well-known cliff nesting sites.
Quick facts
A few more red-billed tropicbird facts:
- Its scientific name is Phaethon aethereus.
- It has a red bill, black eye mask and long white tail streamers.
- It plunge-dives for squid and small fish.
- Its legs are set so far back it can barely walk on land.
- It lays a single egg and can breed year-round here.
Phaethon aethereus, a bird of the open ocean
The scientific name phaethon aethereus — a nod to Phaethon, who in myth drove the sun’s chariot across the sky — suits a bird that spends almost its whole life on the wing over the sea. It is one of three tropicbird species worldwide, and the only one common in Galapagos waters. Built entirely for an ocean-going life, it returns to land only to breed, and even then keeps to remote, sheer cliffs.
Everything about the tropicbird reflects that pelagic existence. Long, narrow wings carry it efficiently over vast distances; a streamlined body and waterproof plumage suit constant exposure to salt and sun; and legs set far back on the body, useless for walking, are the price it pays for being so at home in the air and on the water.
Red-billed tropicbird galapagos nesting sites
The red-billed tropicbird galapagos population nests on sheer cliffs and offshore islets, tucking a single egg into a sheltered crevice safe from most predators. The honest land-based picture: South Plaza (an easy day trip from Puerto Ayora on Santa Cruz) and North Seymour are the realistic places to watch them from a land-based trip, darting in and out of the rock walls beside cliff-nesting neighbours like the swallow-tailed gull. The classic colonies on Genovesa, Daphne Major and Punta Pitt are largely cruise or live-aboard territory.
There is no fixed red-billed tropicbird breeding season in the Galapagos: pairs nest at almost any time of year, so there is rarely a wrong month to look for them. The islands hold a healthy share of a global population the IUCN estimates at 16,000–30,000 mature birds — not the few thousand some operators claim. Courting pairs perform spectacular synchronised flights high above the cliffs, twisting and calling together with a shrill kree-kree-kree, one of the great aerial displays of the islands. Want to see this for yourself? Our 10-day complete Galápagos tour gets you there with a naturalist guide.
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Red-billed tropicbird facts and the frigatebird threat
A few facts capture what makes it special: the brilliant red bill, the bold black eye-mask, and two long white central tail streamers, roughly 45 to 55 centimetres on their own, that trail behind it like ribbons in flight. Males tend to have slightly longer streamers than females, and the birds feed by plunge-diving vertically for squid and small fish.
Life over the ocean is not all grace, though. Frigatebirds harass tropicbirds relentlessly in mid-air, sometimes seizing the long tail to force them to drop a catch — a piratical relationship that plays out above many a Galapagos cliff. Watch the sky long enough and you may see the elegant ribbon-tailed flier turn suddenly into prey.
Out over the open ocean these birds make their living by plunge-diving, folding back their wings and dropping from height to spear flying fish and squid just below the surface. They feed far from land, often alone, which is why a sighting at sea feels so special: a flash of brilliant white against the blue, trailing two impossibly long tail streamers that can be nearly as long as the body itself.
Back on the cliffs the mood changes entirely. Pairs perform looping aerial courtship flights, gliding and calling around the rock faces of islands such as Genovesa, South Plaza and Espanola before tucking their single egg into a shaded crevice or ledge. Both parents share the long work of incubation and feeding, and the chick stays hidden in its rocky nook for weeks, safe from the midday sun and the frigatebirds patrolling overhead.
Where You Will Actually See a Red-Billed Tropicbird
Tropicbirds nest in crevices on sea cliffs, so you see them where the coastline turns vertical. In practice that means Espanola Island and Genovesa Island, often on the same stretch of cliff as the swallow-tailed gull and within sight of the Nazca booby colonies.
Of the two, only Espanola is reachable on a day trip, from San Cristobal Island. For the wider seabird picture and what each island holds, see Galapagos birds.
Frequently asked questions
What is unique about the red-billed tropicbird?
It is the only one of the three tropicbird species with a bright red bill and a finely barred back. Like its relatives it is a superb ocean flier, trailing two long white tail streamers and plunge-diving for fish far out at sea.
What is its scientific name?
Phaethon aethereus. It is one of three tropicbird species and a true ocean-going seabird.
What does it eat?
Mostly flying fish and squid, caught by plunge-diving vertically into the open ocean. It hunts alone or in small groups, hovering briefly before dropping onto prey near the surface.
Why does it have such a long tail?
The two long white tail streamers are used in courtship displays; males usually have slightly longer streamers than females.
Can it walk on land?
Barely. Their legs are set far back on the body, so they shuffle awkwardly on land and only come ashore to nest in cliff crevices.
Where in the Galapagos can you see it?
Around sea cliffs and offshore islands. South Plaza and North Seymour are the most reliable land-accessible sites; Genovesa, Punta Pitt and Daphne Major are usually reached by cruise.
Can you see one on a land-based Galapagos tour?
Yes. South Plaza, an easy day trip from Puerto Ayora on Santa Cruz, has nesting birds in its cliffs, and North Seymour is another land-based option. You do not need a live-aboard cruise to see this species.
What is its conservation status?
The IUCN lists it as Least Concern, with a global population of roughly 16,000–30,000 mature birds, though numbers are slowly declining from fishing bycatch and introduced predators.
Meeting the streamer-tailed seabird
This streamer-tailed seabird turns any cliff walk into a spectacle. Keep your eyes on the sky, watch for the red bill and the trailing white streamers, and you will see one of the ocean’s most elegant travellers come home to nest.
Read more at the Galapagos Conservation Trust, or meet its airborne rival the frigatebird and the rest of the cast in Galapagos islands animals.
Header photo: Mike’s Birds, CC BY-SA 2.0, via Wikimedia Commons.
