What Birds Mate for Life? Swans, Eagles, Albatrosses, and More
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Swans, Canada Geese, Bald Eagles, albatrosses, and Common Ravens are the classic birds that mate for life, and Blue Jays often do too.
For these species, “for life” means the same two birds stay paired from one breeding season to the next, usually until one of them dies. Then the survivor typically pairs up again.
Plenty of birds pair up. Roughly eight in ten bird species raise their young as a pair, so calling a bird monogamous doesn’t narrow things down much.
What sets the lifelong pairs apart is time. Same partner, year after year.
Faithful? That’s a separate question. Chicks fathered outside the pair turn up in most of the monogamous species studied so far, and even geese and swans get divorced.
What “mate for life” really means
“Mate for life” lumps together two things that biologists keep separate, staying paired and staying faithful.
Staying paired starts with social monogamy, one male and one female raising young together. The partnership itself is the pair bond.
For birds, that setup is the norm.
About 81 percent of species raise their chicks as a pair with both parents pitching in, and roughly 9 percent more breed cooperatively, with extra helpers at the nest.
Seen the claim that 90 percent of birds are monogamous? That’s an older estimate.
Social monogamy only describes who raises the chicks. Who fathered them is another story, and so is how birds mate in the first place.
Staying faithful has its own name, genetic monogamy, and it’s much rarer than the social kind. Paternity tests tell a messier story than the nest does.
Across 255 socially monogamous bird species, chicks with a father from outside the pair turned up in 76 percent of them, and in the species where it happens, about one chick in five and one brood in three involve an outside father, on average.
Biologists call these extra-pair chicks. Cheating, in other words.
And yes, pairs split up. Biologists really do call it divorce.
Across 64 monogamous species, divorce usually came after poor breeding success, and the divorced birds tended to breed better with their next partner.
Every bird in this guide is in the table below, sorted roughly from the surest lifelong pairs down to the clear no.
| Bird | Mates for life? | The fine print |
|---|---|---|
| Laysan and Black-footed Albatrosses | Yes | Pairs keep up their courtship dances for decades, and Wisdom re-paired in her 70s |
| Canada Goose | Yes | 15% of females and 18% of males divorced over their lifetimes in one 25-year study |
| Mute Swan | Reported to | Mate changes are infrequent, and widowed swans re-mate |
| Trumpeter Swan | Assumed to | Some switch mates, and some widowed males never pair again |
| Bald Eagle | Typically | A widowed eagle pairs up again |
| Common Raven | Probably | Pairs stay together and hold a territory all year |
| Blue Jay | Often | Stays with its mate year-round |
| Northern Cardinal | Not reliably | Up to 20% of pairs split by the next season |
| American Crow | Year-round pair | Grown young help raise the next brood |
| Mourning Dove | Unproven | Bonded for the breeding season, which can mean up to six broods |
| Ruby-throated Hummingbird | No | Together for days to weeks, then the male leaves |
Bald Eagles
Bald Eagles typically mate for life, staying with one partner year after year until one of the pair dies and the survivor finds a new mate.
Their courtship can look like a crash in progress. In one of several displays, the two fly high, lock talons, and cartwheel toward the ground together, letting go at the last instant.
They’re homebodies. A pair comes back to the same nest year after year and keeps adding to it, with both birds hauling in material.
A typical nest ends up 5 to 6 feet across and 2 to 4 feet tall.
How long can a pair last? Only as long as both birds live. The oldest wild Bald Eagle on record was at least 38.
Lifespan is the ceiling on “for life,” and how long wild birds live varies widely from species to species.
Laysan and Black-footed Albatrosses
Black-footed Albatrosses in a courtship dance on Midway Atoll. Photo: Jaymi Heimbuch
Albatrosses are among the most faithful birds studied. Black-footed Albatrosses live a long time and mate for life, and Laysan Albatross pairs tend to form lasting bonds too.
They still divorce, though. In Black-browed Albatrosses studied in the Falkland Islands from 2004 to 2019, between 1 and 8 percent of pairs split up each year, and warm-ocean years pushed that number higher, even for pairs that had nested successfully.
Laysan Albatrosses return to the colony starting in November to mate, then both birds head back out to sea until the female returns to lay a single egg, which the pair incubates for about two months before a 165-day stretch of chick rearing.
They start late, too. Most don’t raise a chick successfully until they’re 8 or 9.
The rest of the year, partners go their separate ways at sea for months. Albatrosses spend most of their lives out there.
Heard that albatross pairs reunite only every other year? That’s the great albatrosses you’re thinking of, like the Wandering Albatross. They nest every second year, so a pair can be apart for well over a year.
Laysans try to nest annually, though many skip a season every two or three years.
True fact, I once had an albatross crash into my head while I was visiting Midway Atoll. They are not small birds.
Luckily, it got up, shook it off, and waddled away. I had whiplash for a little while.
I was there to see and hopefully photograph Wisdom, the famous Laysan Albatross, but she was out at sea the whole time I was on the island.
Banded in 1956, Wisdom was at least 72 by December 2023. She and her longtime mate, Akeakamai, laid and hatched an egg almost every year from 2006 to 2021. Akeakamai hasn’t been seen since the winter of 2021.
By December 2023, with still no sign of Akeakamai, she was courting again. With a new mate, a red-banded bird known as EX25, she laid an egg in late 2024, then didn’t lay one in the 2025 to 2026 season.
What keeps a pair together through all that time apart? Partly the dancing.
Black-footed Albatross pairs start their courtship dance the first time they meet and keep at it for decades.
The routine runs through bowing, billing, head swinging, preening, mooing, bill clattering, and sky-pointing, with the bill stretched straight up. That last move is what the bird on the right in my photo above is doing.
Canada Geese
Canada Geese mate for life, and their divorce rate is very low. Pairs stay together all year.
Getting there takes a while. Pair bonds can be unstable until the birds are 2 or 3, and most don’t breed until their fourth year.
When they do settle on a partner, they tend to pick one close to their own size.
Perfectly faithful? No. Extra-pair matings are on record for Canada Geese too.
Very low still adds up over a lifetime. A 25-year study that followed 160 collared geese in Connecticut found that 15 percent of females and 18 percent of males divorced at some point in their lives, and the splits came more often after a poor nesting year.
The breakups were lopsided. One ex usually nested again right away, and the other sat out a year or more.
I’ve watched a lone goose come back to the same pond year after year. I never found out whether it had lost a mate.
Mute Swans & Trumpeter Swans
Mute Swans, like the pair at the top of this page, are reported to mate for life. Changing partners is infrequent. By one estimate, under 3 percent of pairs that raise young split up, against about 9 percent of pairs that don’t.
What happens when a Mute Swan’s mate dies? The survivor pairs again, and the details depend on sex and age.
A widowed female re-mates quickly, usually with a younger male. A widowed male keeps his territory if his new mate is young, but if she’s older, the pair moves to hers.
Trumpeter Swans pair up at 3 or 4, stay together all year, migrate as a pair, and often reuse the same nest site year after year. They’re assumed to mate for life. Even so, some switch mates, and some males that lost a partner never paired again.
That loyal reputation made swans a symbol of love. Which is a little funny, given that in one study of Australian Black Swans, 10 to 17 percent of cygnets had a father from outside the pair.
Mute Swans get extremely aggressive about their breeding territory, nest, and young, and they’ll chase off ducks, geese, gulls, and dogs. People too.
In North America that temper is part of a bigger problem. Every Mute Swan here descends from birds imported from Europe between the mid-1800s and the early 1900s, and because they displace native birds and overgraze, several states control them.
The Trumpeter, by contrast, is a native North American swan and a conservation comeback.
Common Ravens
Common Ravens probably mate for life. A pair holds one territory and stays together all year, and ravens start breeding at 2 to 4 years old.
Poe made the raven a bird of gloom. A pair of them reads more like a team.
Raven pairs soar wingtip to wingtip. They sit side by side preening each other, trading soft, warbling “comfort sounds,” and they’re playful fliers on top of that.
They also meddle.
In a study of about 300 wild ravens in Austria, a third bird broke up 106 of 564 friendly interactions, nearly one in five. Usually the meddler already had a bond of its own. The targets? Mostly birds just starting one.
A Common Raven standing in snow, showing its shaggy throat feathers and heavy bill. Photo: Shchipkova Elena/Shutterstock
I once watched a pair work out how to distract a Bald Eagle so they could steal some of its food, communicating with subtle gestures that looked like years of teamwork.
Ravens are known for that kind of tag team. At seabird colonies, one will sometimes distract a nesting adult while the other grabs an egg or chick.
Those years of teamwork have a natural limit. The oldest known wild Common Raven was at least 22 years and 7 months old.
Not sure your big black bird is a raven at all? The raven vs crow identification guide sorts them out.
Why pairs stay together, and how they keep the bond
Staying together pays off, in chicks and in survival.
Switching partners has a cost. A 26-year study of 3,330 Black Brant, a small sea goose, found that birds that took a new mate were less likely to breed, and less likely to survive, than birds that kept their old one.
Blue-footed Boobies show the other side of it. Pairs that had been together longer laid about five weeks earlier, hatched more eggs, and fledged about 35 percent more chicks, whatever their age.
Why would that be? Probably for practical reasons.
Most birds raise their young as a two-parent team, and a partner who already knows the territory and the nest site makes the job easier.
Keeping the bond going takes upkeep, mostly small rituals repeated often. Ravens and albatrosses preen each other. Great Horned Owl pairs call back and forth.
The albatross dance, kept up for decades, is the showiest of them. Building a nest together counts too, and Bald Eagles, ravens, and American Crows all do it.
Wondering whether two birds in your yard are a pair? Watch for mutual preening, for one feeding the other (courtship feeding), or for both of them working on the same nest.
Do backyard birds mate for life?
A few come close. Blue Jays often keep the same mate for life, and no more than one cardinal pair in five splits up by the next season.
American Crows raise their families as a year-round pair. Mourning Doves bond for the breeding season, while hummingbirds never form a lasting pair bond at all.
Blue Jay
A Blue Jay on the grass among fallen leaves, showing its crest and black necklace. Photo: Rogney Piedra Arencibia/Shutterstock
A Blue Jay pair stays together all year, often for life. He feeds her the whole time she’s incubating.
See two jays sticking together at your feeder all winter? They could well be a mated pair.
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Northern Cardinal
A male Northern Cardinal eating berries from a shadbush. Photo: Actium/Shutterstock
Cardinals are less of a sure thing. Pairs may stay together through the winter, but up to 20 percent split up by the next season.
Will the pair at your feeder this winter nest together in spring? Usually, if both survive.
A mated pair shares song phrases, and the female even sings from the nest, which is worth listening for come spring.
Hang a Northern Cardinal at home with the Cardinal Wooden Ornament, double-sided Hinoki wood in blue, pine, or terra cotta.
American Crow
American Crows live as a breeding pair at the center of a year-round family, with young from the past two years staying on to help raise each new brood. How long a pair lasts is less clear.
The family has its secrets. In one population, 32 percent of broods held at least one chick fathered outside the pair.
Crow fan? The American Crow Classic Baseball Hat has an embroidered crow strutting across a low-profile cotton twill cap with an adjustable strap.
Mourning Dove
A pair of Mourning Doves perched together on a shepherd’s hook. Photo: Bonnie Taylor Barry/Shutterstock
A Mourning Dove pair bonds by preening each other’s necks, then grasping bills and bobbing their heads together. It’s sweet to watch.
They’re busy, too.
A pair can raise anywhere from one to six broods a year, and the Mourning Dove egg and nesting timeline walks through each round.
Do they stay together past one breeding season? That part is unproven. The couple on your railing this summer may or may not be next summer’s couple.
For a quieter palette, the Mourning Dove Vintage Style Cross Stitch Pattern charts the dove in muted browns, full stitches only and ready for Pattern Keeper.
Ruby-throated Hummingbird
Hummingbirds are the clear no. A male and female Ruby-throated Hummingbird stay together only long enough for courtship and mating, a matter of days to weeks, and then he’s gone.
Birds that mate for life FAQ
What is the most loyal bird to its mate?
Albatrosses are among the most faithful birds studied, and Black-footed Albatross pairs keep courting each other for decades. In Black-browed Albatrosses, only 1 to 8 percent of pairs divorce in a given year.
Canada Geese are another good answer, with a very low divorce rate.
What happens to a bird when its mate dies?
Usually the survivor finds a new partner. A widowed female Mute Swan re-mates quickly.
Laysan Albatrosses take longer, and a biologist at Midway Atoll has described a year or two of mourning before the survivor courts again.
Wisdom, a Laysan Albatross banded in 1956, paired with a new mate in her 70s. Some birds never re-pair, including some widowed Trumpeter Swan males.
Are any birds 100% monogamous?
Possibly, but it’s hard to prove. In about a quarter of the socially monogamous bird species studied, paternity tests found no chicks fathered outside the pair.
That’s a sample of nests, though, and a clean sample can’t prove a species never cheats.
Do penguins mate for life?
Emperor Penguins, at least, usually don’t. By one estimate, Emperor pairs break up about 85 percent of the time. There’s more on penguin breeding in these 25 penguin facts.
Do owls mate for life?
Great Horned Owls form monogamous pairs. A pair defends its territory by hooting, roosts together near the nest for months, and the two call together.
Whether a pair lasts a lifetime is less clear. More about how they live is in these owl facts.
A Great Horned Owl hooting with its white throat patch puffed out. Photo: Kelp Grizzly Photography/Shutterstock
From the BWB shop, for backyard bird fans
Bring two of this page’s backyard birds home on double-sided Hinoki wood ornaments: a Northern Cardinal on a snowy birch branch and a Blue Jay holding an acorn.
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