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


Wide-Jawed Viciria (Viciria praemandibularis) Male

Yellow-Lined Epeus ( Epeus flavobilineatus)

Fighting Spider (Thiania bhamoensis)

Mangrove Jumper (Ligurra latidens)

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