Arachnids What are Arachnids?. Arachnids Arachnids are spiders, scorpions, mites, and ticks. What they all have in common, and what distinguishes them.

Arachnids

What are Arachnids?

Arachnids Arachnids are spiders,

scorpions, mites, and ticks. What they all have in common, and what distinguishes them from insects, are four pairs of legs and no antennae.

Focusing on Spiders

What are Spiders?

Spiders are small eight legged creatures that are best known for spinning silk webs.

Jumping Spider

Fishing Spider

There are more than 30,000 kinds of spiders.

JEWELLED SPIDERS

LYNX SPIDERS

Golden Silk Orb Weaver

Black House Spider

Spider Life A spider’s life span

ranges from one season to 20 years depending on the type of spider.

Spiders can live anywhere they can find food like fields, woods, swamps, caves and deserts.

Spider Bodies A spider's body has two

main parts.

Spiders come in different shapes and sizes.

Spiders come in different colors.

A spider has no bones and its tough skin serves as a protective outer skeleton.

Spider Legs Spiders have four

pairs of legs.

When a spider walks, the first and third leg on one side of its body move with the second and fourth leg on the other side

Spider Eyes A spider's eyes are on top

and near the front of its head.

Most species have eight eyes, arranged in two rows of four each.

Some spiders can see better than others.

Spider Webs Not all spiders spin webs.

Wherever a spider goes, it spins a silk thread behind itself.

Spiders use their webs or draglines to catch prey, for shelter, and for a quick get away!

Spider Food Below the spider's eyes is

its mouth opening.

The spider can only eat  some of the solid tissue of its prey by predigesting it.

A large tarantula can reduce a mouse to a small pile of hair and bones in about 36 hours by predigestion and sucking.

Helpful vs. Harmful Spiders Spiders are helpful to people because they eat

harmful insects which destroy crops.

A few kinds of spiders are harmful to human beings.

Black

Widow

Venusta Orchard Spider

LYNX SPIDERS

 SPINED MICARATHENA