Monday 10 October 2011

Jumping Spiders



The jumping spider family (Salticidae) contains more than 500 described genera and about 5,000 described species, making it the largest family of spiders with about 13% of all species. Jumping spiders have good vision and use it for hunting and navigating.
They are capable of jumping from place to place, secured by a silk tether. Both their book lungs and the tracheal system are well-developed, as they depend on both systems (bimodal breathing).
Jumping spiders are generally diurnal, active hunters. Their well-developed internal hydraulic system extends their limbs by altering the pressure of body fluid (hemolymph) within them. This enables the spiders to jump without having large muscular legs like a grasshopper. Most jumping spiders can jump several times the length of their body. When a jumping spider is moving from place to place, and especially just before it jumps, it tethers a filament of silk (or dragline) to whatever it is standing on. Should it fall for one reason or another, it climbs back up the silk tether.

White-Moustached Portia (Portia labiata)

White-Moustached Portia (Portia labiata)

Giant Ant-Like Jumper (Myrmarachne maxillosa)

Pystira ephippigera



Wide-Jawed Viciria (Viciria praemandibularis) Female

Harmochirus


Wide-Jawed Viciria (Viciria praemandibularis) Male

Yellow-Lined Epeus ( Epeus flavobilineatus)


Fighting Spider (Thiania bhamoensis)




Mangrove Jumper (Ligurra latidens)

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