Mammels
This large, aquatic mammal is widely recognized as the largest animal ever known to have lived on Earth.
Blue Whale
This flightless African bird is the largest living species of bird and lays the largest eggs.
ostrich
Found in Indonesia, this is the largest living species of lizard on Earth
Komodo dragon
This massive marine reptile is the largest of all living turtles and lacks a rigid, bony shell.
leatherback sea turtle
This marine invertebrate has eight arms, three hearts, and blue blood, and can change its color instantly for camouflage.
octopus
This is the only mammal capable of true, sustained flight
Bat
These are the only birds capable of flying backward and upside down, thanks to a unique wing-socket design.
hummingbirds
Unlike most reptiles, crocodiles and alligators uniquely possess this type of internal organ with four distinct chambers.
What is a four-chambered heart
the specific term used for the upper, domed section of a turtle's protective shell.
carapace
Insects, arachnids, and crustaceans all belong to this massive phylum, characterized by jointed appendages and an exoskeleton.
arthropods
Native to Australia, this egg-laying mammal has a duck-like bill, webbed feet, and a beaver-like tail.
platypus
This type of specialized vocal organ allows birds to produce sounds without the vocal cords found in mammals.
syrinx
This specialized scent-organ, located in the roof of a snake's mouth, analyzes chemical signals gathered by its tongue
Jacobson's organ (or vomeronasal organ)
This iconic archipelago in the Pacific Ocean is famous for its namesake giant tortoises that heavily influenced Charles Darwin.
Galapagos Islands
This specialized microscopic structure is used by most mollusks, like snails and slugs, to scrape or cut food.
radula
This specialized, fibrous structural tissue—made of keratin—is found in the mouths of certain whales to filter food from water.
baleen
: This unique, heavy-bodied bird native to New Zealand is the world's only flightless, nocturnal parrot.
kakapo
This rare, lizard-like reptile native to New Zealand is the sole survivor of an ancient lineage that dates back to the dinosaur era.
tuatara
Turtles do not have teeth; instead, their jaws are covered by a sharp, tough beak made of this protein material.
keratin
These colonial marine invertebrates are responsible for building massive underwater structures that host 25% of all ocean life.
This small, subterranean mammal is the only known cold-blooded (ectothermic) mammal and is highly resistant to cancer.
Members of this highly intelligent bird family, which includes crows, ravens, and jays, have been observed manufacturing and using tools.
corvid family (or Corvidae)
Unlike lizards, members of this legless reptile group lack external ears and moveable eyelids, but they are not snakes.
amphisbaenians( or worm wizards)
This freshwater turtle, native to the Amazon, is famous for its highly camouflaged, leaf-like appearance and its practice of suction-feeding.
mata mata turtle
This micro-animal, also known as a water bear, can survive the vacuum of outer space, extreme radiation, and absolute zero by entering cryptobiosis.
tardigrade