The cobalt blue tarantula (Haplopelma lividum) 

A native of the both Burma and Thailand, The Cobalt Blue Tarantula is usually described as one of the most bad-tempered/aggressive spiders and it is well known for its lightning speed. Cobalt blue tarantulas mostly like to burrow, though they have been known to be able to spin enormous webs. The cobalt blue tarantula’s bite can prove extremely painful although the venom is only moderately toxic. 

(Source: milkthattasteslikerealmilk)

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