Sometimes ships accidentally spill oil into the water. Spilled oil can get on the feathers of penguins. They eat it when they try to clean themselves. This hurts the penguins.
When an animal looks like what is around it, it is camouflaged. Frogs are good at camouflage. Some frogs look like leaves, bark, moss, or even bird poop!
The bright colors of some frogs tell other animals not to eat them. These frogs may be poisonous.
Monarch butterflies lay their eggs only on milkweed. Planting more milkweed helps these butterflies.
Sharks have been around for 400 million years! They lived before, during, and after the dinosaurs.