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Dog flea

life science Maturity 5-7 Next article →

A dog flea is a tiny bug. It lives on many mammals. It mostly lives on dogs and cats. These fleas are ectoparasites. This means they live on the outside of a body. They use special mouthparts to pierce skin. Then they suck blood.

Fleas have very long back legs. These legs help them jump. Their bodies are flat from side to side. They also have spines and hairs. These parts help them move through fur easily.

Female fleas need blood to make eggs. They can lay about 4,000 eggs in a pet's fur. The eggs go through four stages. They start as an embryo. Then they become a larva. Next they are a pupa. Finally, they are an imago, or an adult.

This life cycle takes two to three weeks. It can take longer when it is cool. Fleas can cause many problems. They make dogs scratch and bite. This can make the skin red or sore. They can also spread tapeworms to pets.

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