Are reptiles dangerous

They can be both. Many reptiles, particularly snakes, help keep populations of rodents and other animals under control, and so are an indispensable asset to farmers. Without snakes many places would face famine. Crocodiles and alligators help clean up carrion from lakes and rivers and help keep their prey populations under control as well. At the same time they can be harmful. Venomous snakes kill thousands of people every year and injure even more as they bite in self-defense. Some large constrictors kill in self defense as well. Crocodilians sometimes attack and kill people who enter their territory and, in some instances, eat them. There have also been a few cases of people being eaten by large snakes and komodo dragons.