There are many different types of spiders that live all over the Earth in practically every type of habitat. They come in colors including black, brown, white, gray, red, yellow, green, and orange. Most spiders live for about a year, but the tarantula can live for 15 years.
Spiders range in size from barely visible to many inches across.
Weight for weight, spider's silk is stronger than steel. They have a hard exoskeleton and not an internal skeleton. The egg sac is made of silk, and the color varies from species to species. In some species, the female spider carries the egg sac on her spinnerets or in her jaws until the eggs hatch. In other species, the egg sac is hidden under a rock, attached to a plant stalk, or encased in a web.