Fleas are tiny, wingless insects that belong to the order Siphonaptera. Adult Fleas are typically 2.5 mm in size and have a shiny, reddish-brown exterior. They have flat bodies which allow them to move quickly through fur and hair. Their bodies are covered in tiny hairs and they have spines surrounding their head and mouth. Although fleas do not have teeth, they do have a needle-like mouth which is used to pierce through the skin of their host and suck blood. These insects prefer to feed on hairy animals, and are commonly found on cats, dogs, rabbits, mice, rats, squirrels and other animals, both domesticated and wild. Fleas can’t fly, but they can jump long distances, and they commonly jump from one host to another. Fleas are hazardous to the health of both people and pets because they can carry and transmit various diseases and parasites, including tapeworms. Their saliva can cause an allergic reaction in the form of severe dermatitis, and constant itching can lead to infections. Pets may become anemic if they have a severe flea infestation.