Pulgas, commonly known as fleas, are small, wingless insects that belong to the order Siphonaptera. They are known for their ability to jump long distances relative to their size, which helps them move between hosts. Fleas are external parasites that primarily feed on the blood of mammals and birds, making them a common nuisance for pets like dogs and cats. Fleas can cause discomfort and health issues for their hosts, including itching and allergic reactions. They can also transmit diseases and parasites, such as tapeworms. Effective control measures include regular grooming, vacuuming, and the use of flea treatments to keep pets and homes flea-free.