31 Deadliest Animals On The Planet 3. Black Widow and Brown Recluse Credit: OnHealth Small, but terribly deadly. That’s how the Black Widow and Brown Recluse spiders are aptly described. About three people die in the U.S. from the potent venom of these spiders. Prev Next Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32