The golden lancehead, or Bothrops insularis, is a venomous snake found exclusively on Isla da Queimada Grande, also known as Snake Island, off the coast of Brazil. This species is known for its distinctive yellowish coloration and is adapted to its island habitat, where it preys primarily on birds. Due to its limited range and specialized diet, the golden lancehead is considered critically endangered. Its venom is highly potent, making it one of the most dangerous snakes in the world. Conservation efforts are in place to protect its habitat and ensure the survival of this unique species.