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We have not heard of fleaWe have not heard of flea beetles biting humans. They are not the same as fleas, which can bite humans. If you have a dog outdoors, or some other mammal frequenting your yard (wild or domestic), it is possible that these are fleas. The size is about right. Flea bites can make you itch, and leave a red bump on your skin. Fleas can jump very high. It is possible, though, that the pests in your garden are another insect. If you can catch one, you might show it to a vet (if you think it is a flea) or a pest control specialist.