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Spiders

Spiders give the appearance of nasty looking “creepy crawlies”. Spiders can differ in appearance.

 

 

 

 

 

 

 

 

 

Specifications

Structure

Members of class arachnida may be separated from other arthropods on external features alone. They have eight jointed legs and their bodies are divided into two sections: cephalothorax and abdomen. The cephalothorax is a fused head and thorax region. Palps are located in the front and are often mistaken for an extra pair of legs.

Life Cycle

After fertilisation, the mature female spider produces an egg sac, which varies in size and shape depending on the species. The egg sac of all spiders consists of a mass of silken threads enclosing many eggs. The egg sac is round and can compose of tough web material in the case of redbacks. Some spiders leave their sacs near their habitats or in burrows. Unlike true spiders, scorpions produce their young alive.

Habits

Most arachnids are nocturnal. During the day they are seldom seen, unless they are sought or disturbed in their natural environments. When the light fades, Spiders become active. They leave the protection of their burrows or shelters and go out in search of food or, in the case of web-spinning spiders, construct their webs to lure prey. As  day breaks, most spiders seek the safety of their shelters again.

Diseases

Spiders don’t carry diseases as such, They can bite, sometimes with fatal consequences.