North America’s largest rodent, beavers can grow to over 60 pounds (and four feet long) and are monogamous animals. They are well adapted to their semi-aquatic life, with features like webbed hind ...

Phil Wood / Flickr / CC BY-ND 2.0. Swans form monogamous pair bonds that last for many years, and in some cases, these bonds can last for life. Their loyalty to their mates is so storied that the ...

Unlike most rodents, prairie voles pair up, build a nest, groom each other, and raise their young. ... PHOTO ARK; 10 amorous animals that mate for life. Every day is Valentine's Day for these ...

And we mean life. In fact, studies have shown that 100 percent of albatross couples last until one of them dies. And this is despite them spending most of their time at sea and away from each other.

Why it's awesome: Patagonian maras mate for life, and males are fiercely protective of their partners, following them wherever they go to shield them from other males and from predators.

You may have heard of the "love hormone," or oxytocin. But you may not know that scientists have relied on cuddly rodents like the prairie vole to help us understand how this protein works in our ...

Plains viscacha: A rodent that builds vast underground cities and ovulates more than any other mammal Why it's awesome: Meet the chungungo — also known as the marine otter and sea cat — the ...

Besides beavers, it consists of prairie voles (wee rodents for whom “for life” means but a year or two) and night monkeys. Photo by Flickr user finchlake2000 . Animals Genetics Mating ...

Turns out mice really do sing: Male ones do, to woo their mates. Researchers at Washington University discovered that when a romantically-inclined rodent gets the scent of female he squeaks out ...