19. Wild dolphins call each other by name. They let out a unique whistle to identify each other and will respond if they hear their call played back.

20. Young goats pick up accents from each other, joining humans, bats, and whales as mammals known to adjust their vocal sounds to fit into a new social group.

21. Humpback whale songs spread like “cultural ripples from one population to another.”

22. Elephants have a specific alarm call that means “human.”

23. There’s a place on Earth where seagulls prey on right whales. They dive-bomb the calves coming up to breathe air and take bites of blubber from their backs. The calves’ skin is thinner than adults’, and they have to come up for air more frequently, making them more exposed and vulnerable to attack.

24. Horses use facial expressions to communicate with each other. Researchers have identified 17 discrete facial movements in horses.

25. Azara’s owl monkeys are more monogamous than humans. They live together as families, with two parents and offspring, for up to nine years or when one of the parents dies. Fathers are highly involved in caring for their young.

26. Male gentoo and Adelie penguins “propose” to females by giving them a pebble. These are precious because the penguins use them to build their nests, and they can be hard to find along the barren Antarctic shoreline. If the female accepts the pebble, the pair bonds and mates for life.

27. Barn owls are generally monogamous, but about 25% of mated pairs “divorce.” They do so if breeding is unsuccessful.

28. African buffalo herds display voting behavior, in which individuals register their travel preference by standing up, looking in one direction, and then lying back down. Only adult females can vote.

29. If a honeybee keeps waggle-dancing in favor of an unpopular nesting site, other workers headbutt her to help the colony reach a consensus.

30. The bone-house wasp stuffs the walls of its nest with dead ants.

Bonus Weird Animal Facts:

31. Less time separates the existence of humans and the Tyrannosaurus rex than the T-rex and the Stegosaurus.

32. Animals have some unusual group names. For instance, a group of parrots is known as a pandemonium. Buffalo form an “obstinacy” and rhinoceroses a “crash.” You may have heard of a “murder” of crows, but what about an “exaltation” of larks?

33. Warmer weather causes more turtles to be born female than male.

34. A supercolony of invasive Argentine ants, known as the “California large,” covers 560 miles of the U.S. west coast. It’s currently engaged in a turf war with a nearby supercolony in Mexico.

35. Bats save the U.S. agriculture industry an estimated $3.7 to $53 billion annually by eating pest insects.

36. Fourteen new species of dancing frogs were discovered in 2014, bringing the global number of known dancing frog species to 24.