Fleas are 1 to 10 millimeters long, are flattened side-to-side and have enlarged hind legs. Discover how to identify fleas by their color or jumping behavior with information from an entomologist in this free video on insects and bugs.
About the Author
Mike Quinn has a Master of Science degree in entomology from Texas A&M University. Quinn was the invertebrate biologist for Texas Parks and Wildlife for eight years, where he took the lead on most insect issues.