Fleas are small wingless insects that are parasites to a myriad of organisms. Their bodies are flattened sideways to help them exist on the organism's feathers or the fur it calls home. Their little but strong legs grab onto the animal and hold on for a ride.
Fleas are notorious for being a nuisance to many dogs and outdoor cats, and fleas will also suck blood from the human body. When they reproduce, they lay small oval, white eggs. Gnats are flying insects, and they are lighter, long-legged insects with six legs.
They are sectioned into three body parts, and they have a single pair of wings. Only female gnats feed on an organism's blood, as it is necessary for the development of their eggs, while the male gnats consume plants. Gnats lay their eggs on the water or land, they can be pollinators, as they feed upon crops pests, or they will become pests themselves.