1. Crocodile
   Gila monster
2. Komodo dragon
   Alligator

Alligator moms are some of the most maternal parents in the reptile kingdom. Not only do they create incubators for their young by using mud and decaying foliage, but once they hear their babies' cries, she digs them out of their nest and carries them to water.

1. Stingray
   Alligator gar
2. Jellyfish
   Giant squid

Considered one of the most primitive of the predatory fish, gars are known for their long and narrow snouts. The number of attacks on humans isn't known, but if you're ever in the mood to make an omelette, avoid a gar's eggs at all costs: they're poisonous!

1. Mud turtle
   Alligator snapping turtle
2. Sea turtle
   Pond turtle

What do fishermen and the alligator snapping turtle have in common? They both use lures to attract fish. However, unlike the fishermen, the alligator snapping turtle always has their lure handy; it is a small, pink worm-shaped appendage on their tongues.

1. Lion
   Raven
2. Badger
   Snake

The North American badger is a crafty creature in that it has formed an alliance with another apex predator. When it comes to hunting down prey that is in tunnels (like prairie dogs), the coyote will employ the help of a badger. And if prey tries to run, the coyote's speed helps both animals get a meal.

1. Shark
   Giant Barracuda
2. Pirahna
   Tigerfish

While adult great barracudas tend to hunt alone, young barracudas will often swim in schools. This provides additional protection, and if a predator approaches, these fish have a pretty smart technique—they will circle the predator, confusing it because it probably was only focused on one fish.

1. Panda bear
   Black bear
2. Polar bear
   Grizzly bear

When it comes to fishing, black bears on the Pacific coast usually catch their salmon during the night hours. Why? Because of their dark-colored coats, the salmon could see them during the day.

1. Burmese python
   Ball python
2. Boa constrictor
   Reticulated python

If you were to try to capture a Burmese python, you may need to get some help. In the wild, these creatures can grow to be 18 feet in length and can weigh up to 200 pounds. Currently, the largest Burmese python in captivity weighs about 400 pounds, which can be a chore to move if it needs to be relocated.

1. Puma
   Tiger
2. Cheetah
   Lion

One of the fastest cars in the world is the Bentley Continental GT, which can go from zero to 60 mph in 3.6 seconds. That speed is lower than a cheetah; they can get to that same speed at around three seconds, almost a full second faster than the GT.

1. Dog
   Coyote
2. Fox
   Wolf

Coyotes have had a reputation of being garbage-diving, pet-eating animals. Just like a lot of apex predators, this isn't the case. A majority of a coyote's diet consists of rodents, fruit, deer and rabbits. Only a coyote who has been exposed to humans would attack a pet.

1. Crocodile
   Gila monster
2. Komodo dragon
   Chameleon

Alligators, a close relative of the crocodile, reside primarily in the Americas, however, with the exception of Europe, a type of croc resides there. Currently, there are seven different crocodiles hanging out all over the globe.

1. Crowned eagle
   Wedge-tailed eagle
2. Bald eagle
   Golden eagle

Like many couples, the crowned eagles will go out on dinner dates. The male will fly over the tree lines of the African forests, sending out a call, while the female (who is larger) will swoop in and grab their dinner, which is usually a confused monkey.

1. Massasaugas
   Sidewinders
2. Diamondbacks
   Cobras

The diamondback rattlesnake is divided into two separate species: the eastern diamondback and the western diamondback. These reptiles have deadly venom that has caused human fatalities. The good news is that antivenom is readily available at local hospitals that are in this rattler's range.

1. Barn owl
   Eurasian eagle-owl
2. Great horned owl
   Northern white-faced owl

There are two different apex predators living in the Eurasian eagle-owl's range: the owl itself and the golden eagle. While some may think these two are in direct competition with one another, it isn't true. The golden eagle hunts primarily during the day, and the Eurasian eagle-owl hunts at night.

1. Crocodile
   Caiman
2. Alligator
   Gharial

Related to alligators and crocodiles, the gharial has a unique origin story. When the gharial was discovered, the scientists had made a typo. The scientific name for the gharial is gavialis gangeticus, which misspells the Hindu word gharial.

1. Albatross
   Seagull
2. Giant petrel
   Pelican

The giant petrel received its name from the Bible. The word petrel originated with St. Peter, who walked on water. What's this have in common with the petrel? When they take off, these birds look like they're running on water.

1. Beaver
   River otter
2. Sea otter
   Giant otter

Just like their cousins the river and sea otter, giant otters thrive by eating fish and other aquatic creatures. In addition to the Amazon Rainforest, giant otters are also known to dwell in the Orinoco and La Plata river systems.

1. Chameleon
   Gila monster
2. Gecko
   A Komodo dragon

The Gila monster is one of the biggest homebodies on the planet. These lizards will spend over 95% of their 20-year lives in their burrows. The only time they come out is to grab a bite to eat or to catch some desert sun.

1. White-tailed eagle
   Bald eagle
2. Golden eagle
   Crowned eagle

In addition to being the largest bird of prey in North America, Mexico has adopted this powerful bird as its national bird. It's no wonder—these birds are able to catch prey by diving at speeds up to 150 miles per hour.

1. Pirahna
   Barracuda
2. Goliath tigerfish
   Shark

With 32 teeth measuring one inch each, the Goliath tigerfish is not the most charming creature to look at. On top of that, their size can be a little intimidating; they can grow to be five feet long and can weigh up to 150 pounds.

1. Seagull
   Common gull
2. Great black-backed gull
   Yellow-legged gull

Like many of the apex predators, great black-backed gulls are predators of opportunity. They will eat almost anything, from trash left behind by humans to fish that a humpback whale chased to the surface.

1. Great white shark
   Thresher shark
2. Hammerhead shark
   Nurse shark

Many portrayals of the great white shark depict them as bloodthirsty human devouring creatures; the opposite is true. Their nonfatal attacks scientists call sample bites, where the shark nibbles their prey. Because the humans live, it indicates that they aren't on the shark's diet.

1. Barn owl
   Northern white-faced owl
2. Snowy owl
   Great horned owl

If you ever were to drop something, you better hope that a great horned owl somehow doesn't snatch it! Getting a great horned owl to open its talons requires over 25 pounds of force.

1. Black bear
   Panda bear
2. Polar bear
   Grizzly bear

If you think you could outrun a grizzly bear because of its size, think again. The average grizzly bear has been clocked running at 30 miles per hour, which is only a danger if you startle them or come between a mother and her cubs.

1. Bald eagle
   Siren eagle
2. Harpy eagle
   Golden eagle

The harpy eagle is known for perching for long periods of time to wait for that perfect opportunity to strike. This is with good cause—with prey including monkeys, sloths and iguanas, you really want a good angle to capture an animal of that size.

1. Harris's hawk
   Cooper's hawk
2. Red-tailed hawk
   Ferruginous hawk

What do wolves and Harris's hawks have in common? They are both extremely social and hunt in packs. They also help each other build nests. These social creatures are pretty easygoing, especially around humans, which makes them an ideal candidate for falconers.

1. Leopard
   Jaguar
2. Cougar
   Lion

Unlike a lot of felines, jaguars enjoy a good swim once in a while, which expands their food sources. On land, they eat tapirs, deer and capybaras; from rivers they can eat fish, caimans or turtles.

1. Chameleon
   Gila monster
2. Komodo dragon
   Gecko

The Komodo dragon is a massive creature with its average weight being over 300 pounds. It survives by hunting animals using its claws and shark-like teeth to take their prey down. And if that doesn't work, they have venomous bites which should do the trick.

1. Sea lion
   Leopard seal
2. Walrus
   Harp seal

Leopard seals are the only seals that feast on warm-blooded animals, namely smaller seals. Aside from other members of their species, leopard seals also eat fish, squid and penguins.

1. Lion
   Leopard
2. Tiger
   Lynx

"The Lion King," released in 1994, is considered one of the crown jewels of the Disney Renaissance. Spanning from 1989 until 1999, the Disney Renaissance produced many high grossing films including "Aladdin," "The Little Mermaid," and "Mulan."

1. Lynx
   Siberian tiger
2. Bobcat
   Lion

In order to move in the snow, a lynx will spread its toes out, creating a natural snowshoe. Another thing that comes in handy is the black tufts of fur on the tops of their ears, which helps them hear things from far away, similarly to a hearing aid.

1. Humpback whale
   Orca whale
2. Sperm whale
   Fin whale

If you thought your family was large, think again! A typical pod of orca whales contains about 50 of these creatures. On top of which, they are pretty close knit; even after they reach adulthood, orcas will stick with their parents, making the pod even larger.

1. Grizzly bear
   Polar bear
2. Panda bear
   Black bear

What do many human mothers have in common with panda moms? They both drop their kids off at school! Panda kindergartens allow panda cubs in captivity to play, socialize, and get some snacks.

1. Grizzly bear
   Polar bear
2. Black bear
   Panda bear

When it comes to childbirth in humans, identical twins are pretty rare, occurring in three to four births out of 1000. In polar bears, however, the opposite is true; it is pretty rare that single cubs are born.

1. Lion
   Panther
2. Leopard
   Puma

Pumas were considered pests who preyed upon livestock, which caused farmers to slaughter them, depleting their populations in the midwest. The good news is that deer, the puma's favorite food, has a thriving population and with a little help, the puma can regain its population.

1. Red-tailed hawk
   Cooper's hawk
2. Harris's hawk
   Ferruginous hawk

If you thought impressing your mate for Valentine's Day was impossible, you should check out how the red-tailed hawk gets a date. The potential pair of hawks will perform aerial acrobatics, with the male diving. And if that wasn't enough, if successful, they grab one another and spiral to the ground.

1. Lynx
   Siberian tiger
2. Snow leopard
   Lion

In addition to walking with its toes spread, snow leopards have a couple of ways to keep warm in their cool environment. Just like the common house cat, snow leopards will wrap their tails around their noses to keep warm.

1. Wombat
   Kiwi
2. Tasmanian devil
   Koala bear

Just like the Tasmanian Devil made famous by Bugs Bunny and the gang, Tasmanian Devils are solitary, and when threatened, they are manic, cranky, and loud. To add insult to injury, when another creature threatens the Tasmanian devil, it yawns in the face of its adversary.

1. Lynx
   Lion
2. Tiger
   Leopard

The lion may be the king of the jungle, but the tiger is the largest of the big cats. In addition to this, when the heat hits their fur, they take a dip in a nearby pond where they are excellent swimmers.

1. Platypus
   Tasmanian devil
2. Tiger quoll
   Kangaroo

In 2017, the tiger quoll, which many considered to be extinct, started to make appearances in the Otways, Australia's rainforest. This urged several conservation efforts which will hopefully help this species start to flourish.

1. Wolf
   Fox
2. Coyote
   Dingo

When it comes to seeing wolves, if you see one alone, it may not truly be alone. Most wolves run in packs, consisting of between six and ten animals, each contributing to their family unit.