Monitor lizards, also known as biawak, are opportunistic predators with a diverse diet. In the wild, their food sources vary depending on their size, species, and habitat. Younger monitor lizards typically feed on insects, spiders, and other invertebrates. As they grow, their diet expands to include small vertebrates like rodents, birds, lizards, and snakes. Larger monitor lizard species, such as the Komodo dragon, can even prey on larger mammals like deer and wild pigs. Carrion also forms a significant part of their diet, making them important scavengers in their ecosystems.