Albatrosses: Facts about the biggest flying birds

A black-browed albatross getting ready to take off at the Falkland Islands. Albatross are expert gliders, and spent most of their lives flying above the ocean.

(Image credit: Shutterstock)

Albatrosses are big, majestic birds that can be found soaring above most of the world’s oceans.

These frequent fliers are known for spending months in the air without touching down, as well as having some unique mating arrangements. However, thanks to harmful fishing techniques and predation by invasive species, albatrosses around the world are either under threat or endangered.

This latitude range is "called the 'roaring 40s' and 'furious 50s' for a reason," said Andrea Angel, the Albatross Task Force manager with Birdlife South Africa, a nonprofit organization dedicated to bird conservation. With near constant wind in their environment, albatrosses are able to "lock their elbow joints and literally just fix their wings [in place] and just glide," Angel said. The birds also use something called "dynamic soaring," which involves changing the angle of their wings relative to the wind, to maximize the lift generated — a similar technique could help unmanned research aircraft stay aloft for months, the Independent reported.

As for sleep, Angel said that it's very likely that albatrosses sleep on the wing. A 2016 study published in Nature Communications described how a distant cousin of the albatross, the frigatebird, has many, seconds-long periods of sleep while flying, suggesting that sleeping in the air is definitely possible for other long-distance traveling seabirds. And, based on microchip-tracked movements of albatrosses, "they can [fly] for hours on end, and so it is theorized that they do sleep on the wing," Angel said. "It's an accepted fact [that] because of their movements, they have to sleep."

All albatrosses are very long-lived. The oldest wild bird in the world is a Laysan albatross (Phoebastria immutabilis) named Wisdom, who was tagged in 1956 at the Laysan albatross colony at Midway Atoll in the North Pacific Ocean when she was already a mature adult. That makes her at least 66 years old, but she's likely older, and she's still going strong — as of 2018 she was still raising chicks, NPR reported. According to Breck Tyler, a lecturer at the University of California, Santa Cruz and retired research scientist who studied the Laysan albatross colony on Midway Atoll for decades, there are other Laysan albatrosses just a few years younger than Wisdom, so "she's probably not an outlier."

Although they're seabirds, albatrosses are generally poor divers, with few exceptions. The wandering albatross can only dive about 2 to 3 feet (0.6 to 1 m) into the ocean, yet based on an analysis of its diet, scientists are pretty sure the wandering albatross eats squid that live deeper in the water, and are too big for an albatross to convincingly take down. It's possible the large bird just waits until a squid swims up to the surface, but a more convincing hypothesis is that the birds are actually eating squid bits that have been vomited up by whales, as described in a 1994 study published in the journal Antarctic Science.

Because albatrosses mate for life, picking the right partner is a major decision. All species of albatross have some sort of complicated mating dance. For the Laysan albatross, the dance has 24 separate, complex steps, and it takes years for males to learn them all, Tyler said. And until the young males can master the choreography, they won't find a mate, he said. The females can afford to be picky, so if a male's sequence of honks, whistles, wiggles and neck thrusts doesn't impress her, she'll just move on to the next suitor.

An albatross mating pair only sees each other a few days a year, when they meet at their breeding grounds. After a few days of catching up, the pair takes turns incubating the egg; one stays behind while the other forages for food. After about 90 days, and when the chick is big enough, the mating pair go their separate ways for the rest of the year, according to the Cornell Lab’s All About Birds.

And in many albatross species, female-female pairs are quite common (so far, male-male pairs haven't been reported), as Live Science has previously reported. Those females rely on "cheating" paired males or unpaired males to fertilize their eggs, and then the two females raise a clutch of two eggs together, without a male's involvement, the Times reported. Laysan albatross males and females look virtually identical, so unless you were specifically looking for evidence of same-sex pairs, you'd likely miss them, the Times said — and it's likely that many other species of birds, especially if there aren't enough males to go around, form similar pair bonds, Tyler said.

Many of the world's albatrosses nest on islands that were once used as whaling vessel stopovers, Angel explained. With the human ships came cats and rats and mice. Gough Island in the South Atlantic, for example, is one of the most important seabird colonies, home to 24 different species of birds and multiple types of albatross. But the colony is gruesomely preyed upon by invasive mice that have evolved to be a much larger than normal size without the presence of predators, Hakai magazine reported.

Perhaps because they have no other predators that would attack them this way, Albatross have not evolved a way to defend themselves against a mouse attack, and so some of the adults sit motionless, letting "the mice nibble on their flesh while they steadfastly incubate their egg." On a number of important bird islands, conservationists are launching aggressive mouse-eradication programs to attempt to save the remaining birds, National Geographic reported.

Large fishing vessels have onboard processing facilities where fish heads and tails and guts are removed and dumped back into the sea, which attracts all sorts of seabirds. "It is a seabird spectacle," Angel said. But as the trawler is dumping fish guts, it's simultaneously dropping the giant fishing net back into the ocean for the next catch. Seabirds, including albatrosses, get entangled in the net cables and dragged under water, then drown. And longline fishing boats, in which a 30-mile-long (48 kilometer) floating fishing line is set with hundreds of baited hooks, also attract seabirds which see the enticing meal from the surface, but get caught on the hooks and drown.

Rachel is a writer and editor based in Washington, D.C., who covers a range of topics for Live Science, from animals and global warming to technology and human behavior. Rachel also contributes to National Geographic News, Smithsonian Magazine and Scientific American, and she is currently a senior editor at Next City, a national urban affairs magazine. She has an English degree with a journalism concentration from Adelphi University in New York.

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