Flea, the common name for the order Siphonaptera, includes 2,500 species of small flightless insects that live as external parasites of mammals and birds. Fleas live by ingesting the blood …

May 15, 2024 · Fleas are small insects that survive by feeding on animal or human blood. Their bites can cause discomfort, itchiness, and irritation. Sometimes, fleas can infect people or pets …

Dec 26, 2025 · Fleas are small, wingless insects with a tough cuticle bearing many bristles and frequently combs (ctenidia) of broad, flattened spines. The adult flea varies from about 0.1 to …

Oct 22, 2025 · Fleas are wingless, ectoparasitic insects that constitute the order Siphonaptera. Around 2,500 species of fleas are found worldwide, of which over 94% live on mammalian …

Oct 24, 2025 · Discover the biology and life cycle of fleas — wingless, blood-feeding insects that infest mammals, birds, and even reptiles worldwide.

Historically, fleas have been involved in devastating epidemics of plague throughout the world. Today in the U.S., fleas primarily are annoying biting pests of pets and people. The most …

4 days ago · Fleas are tiny, parasitic insects that primarily feed on the blood of mammals and birds. While commonly associated with pets like dogs and cats, fleas can infest homes, …

Information about identifying fleas, flea lifecycle, how fleas are harmful and how to control fleas.

Fleas are one of nature’s most formidable survivors, with a history that predates much of modern life on Earth. These tiny, wingless insects are known for their remarkable jumping abilities and …

Fleas will bite both people and pests alike. Their bites commonly cause small painful, itchy red bumps with a “halo” around the bite center. Unlike mosquito bites, they remain small and …