There’s a Brazilian island forbidden to the public, because it’s home to one of the deadliest snake species!

The golden lancehead is a species of viper that densely populates the island of Ilha da Queimada Grande, off the coast of Sao Paulo, Brazil. The island is forbidden to the public, due to the snake making its home there. It is named for the coloring of its underside and the shape of its head, which is unique to its genus. 

On average the snake is about 70 centimeters and its known maximum length is 118 centimeters. There aren’t any actual documented cases of humans being bit by the snake, because they have been kept from the island they live on. They solely live on the island of Ilha da Queimada Grande. 

Other lanceheads have bitten humans, though, and are actually the cause of the most human morbidity and deaths by snakes in North and South America. The golden lancehead has the fastest acting venom of its genus. Their bites cause swelling, vomiting, and even as severe as a brain hemorrhage. 

(Source)