Top 10 Animals with the Weirdest Behaviors

The Top Ten
1 Cuckoo

The cuckoo bird's approach to parenting is weird - they do not build a nest to lay their eggs in but do so in other birds' nests for them to look after their young. The cuckoo birds lay or drop their eggs into the nest of another bird, and once her eggs hatch, the female will attempt to drop the other species' eggs out of the nest.

2 Brown Trout

Female Brown Trout fake an orgasm to encourage males to ejaculate prematurely. A fake orgasm makes the male think he's mated successfully when, in fact, he has failed. It's bizarre that fish have orgasms and can fake them.

3 Elephant Elephants are the largest existing land animals. Three living species are currently recognised: the African bush elephant, the African forest elephant, and the Asian elephant. They are the only surviving members of the family Elephantidae and the order Proboscidea, extinct relatives include mammoths... read more

They grieve, bury their dead, and may visit gravesites regularly.

4 Histiostoma Murchiei

Histiostoma Murchiei is a parasitic mite found in the cocoons of earthworms. The females can create husbands from scratch all by themselves because they can lay eggs without fertilization. When the sons of a female grow up, she copulates with them, and the sons die shortly thereafter. Afterward, the female can lay many more eggs, producing around 500 long-lived females - these new baby girls are actually fathered by their dead brothers.

I'm just going to say right now that I'm glad I'm human and not a newborn parasite destined to die by sexual intercourse at the hands of my own mother.

5 Flatworm

They are hermaphrodites, meaning they can inseminate and be inseminated. To decide who will be the male, they perform penis fencing, which is an act of battle because both want to be the male. The winner is the one who pierces the skin of the other and becomes the male.

Oh, and some of them have two penises. In the image I added, you can see this penis fencing ritual before mating (each has two penises - the white spikes on the undersides of their heads).

6 Pistol Shrimp

Also known as the snapping shrimp, they spit bubbles at supersonic speed. The resulting sound is a sonic boom, and the shockwave from the bubbles is so powerful that it can break glass and stun larger fish.

The temperature of the shockwave instantly reaches that of the surface of the sun! They shoot the bubbles and produce a loud snapping sound using one of their front claws, which is larger than half the shrimp's body. In the image, it's the long structure on the right end.

They have a pistol-like feature made of two parts, with a joint that allows the "hammer" part to move backward into a right-angled position. When released, it snaps into the other part of the claw, emitting an enormously powerful wave.

7 Adelie Penguin

Their mating ritual is like a Rock 'n' Roll romance, literally.

1. The male penguin rolls a stone to the feet of the female to make it clear that an engagement has been offered.

2. The female gives her approval by responding with a belly-to-belly mating song.

8 Scorpion Fly

The males have to spit a lot to survive because the female tries to eat the male during or after mating. To save his life, the male spits sticky saliva onto leaves that the female eats - this distracts the female so she doesn't eat the male.

9 Human Humans (Homo sapiens) are the most abundant and widespread species of primate, characterized by bipedalism and large, complex brains. This has enabled the development of advanced tools, culture, and language. Humans are highly social and tend to live in complex social structures composed of many cooperating... read more

It's obvious we are the weirdest, but not in a bad way. For instance, we put things on ourselves, make and carry clothes and other devices to live on, walk on two feet, and actively manipulate the environment around us.

While other animals do manipulate their environment or have degrees of self-awareness, we are the only ones who love fire. Chimps appear curious about it, and other animals usually detest it, but humans have a weird fixation with fire, which has helped us survive and thrive.

10 Horned Lizard

They squirt blood out of their eyes as a defense mechanism.

I think there are other lizards that can do that too.

The Contenders
11 Cows Cattle (Bos taurus) are large, domesticated, cloven-hooved, herbivores. They are a prominent modern member of the subfamily Bovinae and the most widespread species of the genus Bos. Adult females are referred to as cows and adult males are referred to as bulls... read more

Cows face the same two directions when they eat - either north or south. And scientists still can't say why. Why do cows hate facing east and west?

12 Naked Mole Rat The naked mole-rat, also known as the sand puppy, is a burrowing rodent native to parts of East Africa. It is closely related to the blesmols and is the only species in the genus Heterocephalus of the family Heterocephalidae.

1. They can run as fast backward as they can forward, even when completely blind.

2. They don't feel chemically-induced pain, so they wouldn't notice if you spilled acid on their skin.

3. The queen mole rat pushes around other female mole rats to cause them stress, which releases hormones that make the other females unable to procreate.

13 Zebra Finch

Female Zebra Finches lay larger eggs when the mate is unattractive (most female birds lay smaller eggs when their mate is unattractive). The female Zebra Finch lays a larger egg to give her little ugly finch-ling a better start in life, with more nutrients and more room to grow, despite the father's imperfections.

14 Camel A camel is an even-toed ungulate within the genus Camelus, bearing distinctive fatty deposits known as "humps" on its back.

The whole Camel Family spits when upset - camels, llamas, some alpacas, and guanacos. They spit stomach contents and saliva in the face of the annoyer.

15 Frigate Bird

During the breeding season, males inflate their red throat pouch into a huge red balloon that can last for up to 30 minutes.

16 Sage Grouse

The male (in the image) has two gular sacs that it inflates to attract mates. They look like silicone boobs.

17 Deer Deer are the ruminant mammals forming the family Cervidae. The two main groups are the Cervinae, including the muntjac, the fallow deer and the chital, and the Capreolinae, including the elk, reindeer, the Western roe deer, and the Eurasian elk.
18 Cat The cat (Felis catus) is a domestic species of small carnivorous mammal.
It is the only domesticated species in the family Felidae and is often referred to as the domestic cat to distinguish it from the wild members of the family. A cat can either be a house cat, a farm cat or a feral cat; the latter... read more

My cat is certainly a strange one.

19 Raccoon The raccoon, sometimes spelled racoon, also known as the common raccoon, North American raccoon, northern raccoon and colloquially as coon, is a medium-sized mammal native to North America.
20 Seagull
21 Llama The llama is a domesticated South American camelid, widely used as a meat and pack animal by Andean cultures since the Pre-Columbian era.
22 Alpaca

They are from the camel family, so they spit too.

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