Some species of salamander are direct-developing — skipping the aquatic larval stage entirely.

Butterflies can see ultraviolet patterns on flowers.

Fact #368 · Animals

Octopuses have three hearts and blue blood.

Fact #1 · Animals

Sea otters use rocks as tools to break open shellfish.

Fact #43 · Animals

Some amphibians undergo dramatic transformations during metamorphosis.

Fact #493 · Animals

Elephants communicate using low-frequency sounds.

Fact #51 · Animals

Certain frogs can inflate themselves to appear larger to predators.

Fact #377 · Animals

A great horned owl has powerful talons for hunting.

Fact #449 · Animals

Some marine animals use bioluminescence to produce light.

Fact #208 · Animals