Mammals
Birds
Herps
Fish
Invertebrates
100

This North American mammal heavily supports the theorized existence of Pangea.

What is the Virginia Opossum?

100

This small bird is famous for its ability to hover in place, thanks to its unique wing motion, and is often associated with pollination.

What is a hummingbird?

100

This subarctic species of frog hibernates amongst litter fauna and freezes up to two-thirds of its body's water.

What are wood frogs?

100

This organ in fish allows them to extract oxygen from water, functioning similarly to lungs in terrestrial vertebrates.

What are gills?

100

This protein, found in the exoskeletons of arthropods, provides structure and protection.

What is chitin?

200

This is the most abundant order of mammals.

What is Rodentia?

200

In some bird species, like the raven, this behavior involves hiding food to eat later, demonstrating complex cognition.

What is caching?

200

This structure in many reptiles allows them to perceive vibrations in the ground and is especially sensitive in snakes.

What is the Jacobsen's organ?

200

This is the name of the structure that helps fish maintain buoyancy in the water by regulating the amount of gas it contains.

What is the swim bladder?

200

This phylum, which includes arthropods and crustaceans, is the largest and most diverse group of invertebrates.

What is Arthropoda?

300

The adaptation that allows mammals to maintain a constant body temperature is known as this.

What is endothermy (or warm-bloodedness)?

300

This animal is the closest living non-bird relative to birds.

What are crocodiles?

300

This organ in reptiles allows them to sense infrared radiation, enabling them to detect warm-blooded prey.

What is the pit organ?

300

The largest species of fish, which can grow up to 40 feet in length, is this filter-feeding fish.

What is the whale shark?

300

This phylum of invertebrates, including organisms like clams, snails, and squid, is characterized by soft bodies and often a hard external shell.

What is Mollusca?

400

This mammal is known for its ability to produce venom and belongs to the family of marsupials.

What is the slow loris?

400

This extinct group of flightless birds, once widespread across the Southern Hemisphere, includes species such as the moa and the elephant bird.

What are ratites?

400

The largest living species of reptile, a marine reptile capable of reaching lengths of up to 23 feet, is this.

What is the saltwater crocodile?

400

This species of fish, native to the Great Lakes, is a member of the ray-finned fish group and is an important part of many freshwater ecosystems.

What is the lake sturgeon?

400

The unique ability of cnidarians to sting prey is due to specialized cells known as these.

What are nematocysts?

500

These early mammals, dating back to the late Cretaceous period, were known for their egg-laying abilities.

What are monotremes?

500

This part of a bird’s skeletal system is highly adapted for flight, being light and hollow yet strong.

What are pneumatic bones?

500

This group of amphibians includes species like the axolotl, which are known for retaining juvenile features into adulthood.

What are neotenic salamanders?

500

This class of fish includes species like salmon and trout, which are known for their migration between freshwater and saltwater.

What are anadromous fish?

500

Certain invertebrates like ants and bees perform this behavior to communicate the location of food sources to other members of their colony.

What is the waggle dance?

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