Indonesia Grapples with Rising Crocodile Conflicts: Ecosystem Contributions and Coexistence Challenges

For communities living near rivers and coasts, the ripple of water does not always signal the presence of fish. That sound could be a warning that a saltwater crocodile is nearby. With armored skin, a powerful tail, and a deadly bite, this ancient reptile is a top predator to be reckoned with. Indonesia records a high number of human-crocodile conflicts. From 2020 to 2024, there were 820 crocodile attacks, with 414 fatalities. More than 95 percent of these cases involved saltwater crocodiles (Crocodylus porosus). Nearly half of the attacks were related to fishing activities, while about a third occurred when communities engaged in domestic activities such as bathing, washing, and meeting sanitation needs. These conflicts do not have a single cause. Habitat loss, shrinking living spaces, and reduced natural prey are forcing crocodiles to enter human activity areas more frequently. Simultaneously, population growth and the fading of local knowledge mean humans are becoming less accustomed to sharing space with these animals. Habitat constriction can even increase the intensity of encounters, rather than decrease them. Yet, saltwater crocodiles play a significant role in the ecosystem. From eggs up to one year old, crocodiles are vulnerable to predation by various animals. Their survival rate in the first year can be less than five percent. After growing, crocodiles become predators that help control the populations of other animals, including snakeheads, catfish, and snakes. As resilient predators, saltwater crocodiles have high tolerance for various habitat conditions. The movement of crocodiles from freshwater to land, coasts, and even the sea helps transfer biomass and nutrients between ecosystems. Adult crocodiles stir up bottom sediments in water bodies, allowing nutrients to be released back. Females...