Macaroni penguins are the most devoted bird couples; when reunited, they dance. While fathers raise chicks, mothers hunt.
Sandhill cranes communicate with one another using "unison calling." Males answer with a single squawk, whereas females squawk twice.
Seahorses flirt by dancing and twirling their tails. Male seahorses give birth, while females compete for mates and become jealous.
The alpha male and female are a power couple in a grey wolf pack; the group's hierarchy is dependent on them. They only reproduce once a year.
Barn owls have their own love language. Males "flirt" by handing out dead mice and shrieking, while females reply by croaking if they are interested.
Shingleback skinks mate with the same female every mating season. Partnerships persist for more than 20 years and they walk closely together.
Each breeding season, eagles return to the same partner. Males assist in the incubation of eggs and the feeding of offspring.
Some little apes experience relationships that include breakups and "remarriage." Couples that stay together groom and nurture their children equally.
Vultures have a romantic side despite their bleak reputation. During courting, males circle and chase females. Couples spend the entire year together.
Beavers are lifelong companions. According to a study, European beavers are devoted. North American beavers partner up, but they also "see other people."