Ectoparasites are organisms that live on the exterior of a host, feeding on its tissues or bodily fluids. Common examples include fleas, ticks, and lice. These parasites can cause various health issues for their hosts, including irritation, allergic reactions, and the transmission of diseases. The presence of ectoparasites can significantly impact the well-being of both animals and humans. They often thrive in environments where hosts are abundant, making control and prevention essential. Understanding the life cycle and behavior of ectoparasites is crucial for effective management and treatment strategies.