Humans use language to communicate. Animals communicate, too. Find out how.
JOHNNY JOHNSON—GETTY IMAGES
Some animals use sound. Each penguin has a special call. Other penguins hear the sound and know who is calling.
MARK CONLIN—GETTY IMAGES
Some animals light up. Jellyfish can make their bodies glow. They light up when a predator comes near. The light scares the predator away.
ELVIRA DRAaT—GETTY IMAGES
Some animals use movement. Fiddler crabs wave their claws in the air. They do this to attract a mate.
Some animals use color. An octopus changes its color. A light color means the octopus is friendly. A dark color means it is angry.
Dolphins don’t have ears. But they understand sounds made by other dolphins. How? Sound makes vibrations in water. Dolphins feel the vibrations in their jawbone.