Compléter WHAT ANIMAL IS IT ?Version en ligne In this activity you will develop a fill in the blanks activity n order to test your knowledge about exotic animals. par juan giraldo 1 amount wandering larger venom amount Brazilian dangerous dangerous most dangerous species damage spider widow spide Black spiders are known world - wide to be one of the most in the world , but it is surey not the most of the many that there are . The is known for being the out if them all . he of depends on the of injected . an intravenous injection of 0 . 006 mg of venom from these spiders caused death in mice could be regarded of little concern to humans , since we are many times than a mouse .