The spider's Walking On Water

Water Spider

Classification

Kingdom : AnimaliaPhylum : ArthropodaClass : ArachnidaOrder : AraneaeFamily : CybaeidaeGenus : ArgyronetaSpecies : Argyroneta aquatic

The water spider (Argyroneta aquatica japonica) is a

subspecies of the water spider. In Japanese it is called the

mizugumo. The Japanese water spider is almost exactly like its

European cousin. The only distinction between the two is that the Japanese water spider

has larger genitalia. Like its cousin, the Japanese water spider lives under water by constructing diving bells,

underwater spheres that contain oxygen, which they live in.

Characteristic• Water spider has a unique

body structure that enables it to walk on water.• At each end of the spider's

legs are thick velvet fabric consisting of hairs are coated with waterproof wax. This enabled him to walk on water without sinking. • Buoyancy is so high that can

run comfortably on the water even though his weight was 25 times greater.

When walking on water, water spiders use his hind legs as a rudder. Middle legs to move, while the shorter front legs to catch prey. Water spiders moving so fast that suddenly can jump forward as far as one meter above the water surface. That is, he moves as fast as the motor-boat.

Walking on Water

Hunting a prey

• When hunting, the spider uses water as the water level of the net.

• Dragonflies, flies, or a butterfly that falls into the water because it failed to fly is an ideal prey for this species of spider.

• When their wings touched the water, insects trapped in the surface water is attached to a paper-like flies. Weakest vibrations caused in the surface water can be felt by this spider.

• In addition to the location of the fall, the spider can also measure large fall prey. He soon chasing prey toward the trapped in the water, a bite with venom and kill.

Reproduction• Males and females are different

in many ways. • Males rove frequently, searching

for prey and for mates. • Females, however, spend the

majority of their lives inside their diving bells; they ambush their prey.

• Males are better divers than females.

• Females and juveniles are active during the night, while males are active during the daytime.

• The young do not balloon as other spiders do; rather, they leave their nest and find their new homes by swimming.