Fleas are tiny, wingless insects that are known for their ability to jump long distances relative to their size. They are external parasites that feed on the blood of mammals and birds, including pets like dogs and cats. Fleas can cause itching and discomfort, and they may also transmit diseases to both animals and humans. These pests thrive in warm, humid environments and can quickly multiply if not controlled. Fleas lay eggs in the fur of their hosts or in the environment, leading to infestations. Regular grooming and treatments for pets can help keep fleas at bay and protect your home from these pesky invaders.