What is a spider?
A spider has eight legs,but an insect has six. Its body has two parts while an insect has three. Also insects have antennae and most have wings, but spider do not have these. Spiders are some of the most feared and least understood in the animal world.
These hairy hunters are famous for spinning silk and giving a poisonous bite. There are about 37,000 known species and probably another 35,000 to be found. There is only about 30 species that are dangerous to people. Spiders live just about everywere, like forests, deserts, grasslands, caves ships and in our homes. Some spiders spin webs to catch ther prey while others leap out from hiding places or stalk their meals like a tiger.
Kinds of spiders:
The order of spiders is divided into three suborders. In the first and most ancient spider group, mesothelae, there are only nine species. Unlike all other spiders, the mesothelae have 12 abdominal segments, two pairs of book lungs, and only two pairs of spinnerets. These spiders are very rare and found only in eastern Asia. The members of the second suborder, orthognatha, or mygalmorph spiders, include the tarantulas of north america. They are also primitive but are found all over the world, especially in tropical and subtropical habitats. These spiders move their jaws vertically, or up and down. All spiders use their jaws to soften or "chew" prey, but some mygalomorphs also use their jaws to dig burrows. The majority of spiders belong to the third group of spiders, labidognatha. Or araneomorph spiders, which includes the hunting spiders and the web spinners. These spiders are easily distinguished from the mygalomorphs because they move their jaws sideways, like a pair of pliers. The araneomorphs use their jaws to carry their egg sacs. "chew" large prey, transport small prey, or sing to their mates prior to mating
The majority of tarantulas are black or brown. Some species, however, exhibit striking colours. An example of this would be the mexican red-legged tarantula, with it's bright red leg markings.
dig their own burrows, others use ready-made crevices or abandoned rodent
hole. Some make their homes under rocks or logs or under the bark of trees.
Others build silken retreats on trees, cliff faces, the walls of buildings,
or in crop plants such as bananas and pineapples.