Animals Where You'd Be Surprised to Learn How Much They Are Related

Nowadays animals (and any living creatures in general) aren't classified based on morphological simmilarities, just genetic relation. In some cases, these relations aren't the same as we might believe. Each of us know some closer relations like mammooth-elephant, but can you guess who are the closest living relatives of elephants? You might guess rhinoceros or hippos but the actual closest relative doesn't resemble elephants at all.

You might wonder how close the relation should be between animals in an item. You could say, "of course elephants and hyraxes are related, they are both mammals. That's right, but not surprising. This is a subjective list, if you add items, you have to judge if a relation is close enough to be surprising.

The Top Ten

1 Crocodiles and birds

While for the first time it may be a surprise that birds' closest living relatives are crocodiles, it isn't astounding if you think beyond. Most of us know birds are related to reptiles, but it's a less known fact that crocodiles are less related to turtles (a.k.a. some other reptiles) than to birds. - Alkadikce

Not exactly. Birds are dinosaurs. The dinosaur line separated from reptiles extremely early.

Looks like I don't know much about animals. This list proves it. Lol - Misfire

Wait, what?

2 Primates and treeshrews

The hell are treeshrews? - Luckys

This is actually a pretty well-known fact, but it still surprises most people. Treeshrews have the largest brains in proportion with the rest of their body. While the resemblance is minimal, I actually find treeshrews' ears somewhat similar to human ears. The order of animal groups from the most related to humans:
1. chimpanzees
2. gorillas
3. orangutans
4. gibbons
5. Cercopithecidae (i.e. swamp monkey, talapoin, macaque, vervet)
6. New World monkeys
7. tarsius
8. every other primate
9. flying lemurs
10. treeshrews
All these animals together make up the clade Euarchonta - Alkadikce

3 Elephants and hyraxes

Hyraxes are the closest living relatives of the three elephant species. There is even an African language in which hyraxes are called the small brothers of elephants. Hyraxes have no very close relatives so they make up an individual order called Hyracoidea. If you haven't heard of them: check them out, they don't resemble elephants in any way. - Alkadikce

Really? O_o - BorisRule

4 Cats and dogs

I didn't add this one, I don't think it's shrprising at all. Cats and dogs belong in the same order of placentals, which I consider a smaller relation than what would be surprising. - Alkadikce

5 Flies and fleas

Not the most surprising on the list, but I would think that flies's (which includes mosquitos) closest relatives are bees or wasps. Flies and mosquitos make up the order Diptera, while they make a bigger clade with fleas (which is a separate order as well). Their next closest relatives (excluding some obscure groups) are butterflies. - Alkadikce

There both annyoying - lemur

6 Sharks, rajas and rabbit fish

Sharks and rajas are the two types of cartilaginous fish commonly known, rabbit fish (not to be confused with rabbitfish) are the lesser known and they look nothing like sharks and rajas - Alkadikce

7 Hedgehog tenrecs and golden moles

This is more like "animals you'd be surprised are NOT related". Hedgehog tenrecs look exactly like hedgehocs for the first glimpse, than you realise their heads don't resemble hedgehogs at all. Together with golden moles (who aren't closely related to moles), hedgehog tenrecs (not closely related to hedgehogs) belong in the order Afrosoricida. Real hedgehogs's relatives are shrews (who aren't relatives of treeshrews and elephant shrews). - Alkadikce

Not at all surprised

8 Elephant shrews and elephants

This is just funny because when you see an elephant shrew you would think there's more shrew in it than elephant, while it the opposite case. I put it low because the relation isn't very close: they only belong to the same superorder of placentals but different orders. - Alkadikce

This is actually a true fact. No joke. - IceFoxPlayz

9 Hyenas and cats

Believe it or not, hyenas are closer relatives of cats than dogs, they both belong in the suborder Feliformia while dogs are in Caniformia, together with bears, weasels and seals. - Alkadikce

10 Carnivores and pangolins

Carnivores are ANY meat-eater. The term you're looking for is "Carnivoran". - KalloFox34

Carnivore here refers to an order of mammals consisting of (among others) wolves, foxes, seals, hyenas, cats. Together with pangolins, they make up the clade Ferae which way the original name of the carnivore group in Linné's times. - Alkadikce

The Contenders

11 Albatrosses and penguins

Not sure if this is surprising or not. Penguins make up a seperate order of birds, and the closest related order of birds consists of various seabirds including albatrosses, petrels, storm petrels and shearwaters - Alkadikce

12 Hippos and whales

I already knew about this since when I was young. - DinoLover4242

13 Falcons and parrots

Falcons are more closely related to parrots than to hawks. - Crwth

14 Canines and raccoons

Dogs are related to trash pandas? Interesting. - truckturner

15 Crustaceans and insects

Wait, the crabs, lobsters, crawdads, and shrimp (crustaceans) we eat are related to the little buggers that flies around us? I never knew that. - DinoLover4242

We can add arachnids to that. - KalloFox34

16 Carnivores and ungulates

Together with pangolins, cets and bats, they are the clade Scrotifera. - Alkadikce

17 Chickens and Dinosaurs

Again this is a bit of a myth - Murphypaw

18 Crocodiles to Alligators
19 Tenrecs to Elephants
20 Sloths to Anteaters

Can't believe I had to add this one they're members of the same Order: Pilosa, which is part of Xenarthra (which also includes armadillos). - KalloFox34

21 Deer and cattle

Umm, is this really a thing? - DinoLover4242

22 Horses and rhinos

Tapires being the third family of the order Perissodactyla. - Alkadikce

23 Jellyfish and sea anemones

I'm not surprised about that, since jellyfish and sea anemones are very close. - DinoLover4242

24 Cephalopods and gastropods

I already know that since around 2013. - DinoLover4242

25 Spiders and horseshoe crabs

I've actually heard about that before. - DinoLover4242

26 Birds and Bees

Son, it's time we had, "The Talk". - HexBolt0505

27 Birds to Bats
28 Emus to Ostriches
29 Raccoons to Bears
30 Raccoons to Mustelids
31 Tenrecs to Elephant Shrews
32 Manatees to Elephants
33 Humans to Chimpanzees
34 Ducks to Geese
35 Ducks to Swan
36 Geese to Swan
37 Chickens to Crocodiles
38 Frogs to Fish
39 Gorillas to Orangutans
40 Pigs to Peccaries
41 Black Rats to Capybaras
42 Rhinos to Tapirs
43 Horses to Tapirs
44 Koalas to Thylacines
45 Whales to Dolphins
46 Skunks to Bears
47 Rabbits to Mice
48 Rats to Bats
49 Turtles to Tuataras
50 Snakes to Lizards
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