Fleas are small, wingless insects belonging to the order Siphonaptera. Their laterally compressed bodies enable them to move effortlessly through the fur or feathers of their hosts. Fleas are ectoparasites and feed on the blood of other animals, including humans. Although commonly associated with infesting domestic pets such as cats and dogs, they can also affect other mammals. Flea bites can cause intense itching and discomfort, and in some cases, they can transmit diseases to their hosts. Fleas possess a remarkable ability to jump long distances due to their powerful hind legs, allowing them to navigate through their environment and find new hosts.