Average Annual Death Toll: 1,700
Each year, hundreds of deadly attacks are attributed to the Nile crocodile in sub-Saharan Africa. Since a majority of fatal attacks are believed to be predatory in nature, the Nile crocodile can be considered the most prolific predator of humans among wild animals. So that's why Jackson chose to face the lions instead of the crocodiles in Zoo's pilot episode!
At 20 feet in length and weighing more than 2,000 pounds, the notorious Gustave is credited with killing hundreds of people at the Rusizi River in Burundi. Even though numerous capture attempts have been made (including using a massive bear trap,) Gustave has continuously evaded capture. Now that is one crafty, colossal, and cruel crocodile.
© Harry Laub/imageBROKER/Corbis