Once, several thousand deer and a few dozen mountain lions lived together in a part of Arizona. Each year, the mountain lions ate hundreds of deer. But, during the year, hundreds of new deer were...
Keep out!
Some animals hunt for food in many different places and sleep wherever they happen to be. But other animals always sleep and hunt in the same place. This place is their territory. A dragonfly's...
Life in low places and high places
Underground caves are blacker than a lump of coal. Mountaintops are cold and bare. It doesn't seem possible for animals to live in these places. But animals do live in them. Small, white fish swim...
Why animals live where they do
You eat bacon and cereal for breakfast. A bear eats fish and berries. Some kinds of animals eat only food from plants. Some kinds eat only other animals. Some animals eat both kinds of food. But each...
Plants and animals need each other
Plants and animals trade with each other. They trade for things they both need to stay alive. Animals breathe air. The air gets changed inside their bodies. When they breathe the air out again...
Living Together
> A monarch butterfly caterpillar can live wherever there are milkweed > plants. Everywhere in the world, different kinds of plants and animals live together. Some animals eat plants they live...
The night world
A mouse scampers through the grass in a meadow. It is night and only the stars are out. The mouse can hardly see, but it finds its way in the dark, because it is in its territory. The air is full of...
A different way of hunting
A hungry rattlesnake glides through the grass at night. The animals it hunts can't see it well in the dark. The snake can't see them either, but it doesn't have to. It has another way of finding...
The Animals’ World
We see, hear, smell, and feel the world around us. So do animals. But many animals do these things in different ways. Some kinds of animals can't do all of them. Some kinds of animals do them better...
Sounds that say things
> Red-Winged Blackbird > > When a male bird sings in the springtime he is often telling other > male birds to stay away. Owls hoot. Foxes yap. Crickets chirp. Geese honk. Chipmunks chatter. And...