1. American dog tick
American dog ticks are brown with a patterned back on adults. Adults are about the size of a sunflower seed, and they like sunny grassy places, trails, parks, and the edge of woods. They are mostly common in suburban yards such as Orange Park, Nocatee, Mandarin, Riverside, and Avondale.
2. Fleas
Fleas are very small, dark brown, and they cannot fly, but they can jump far. They are about 1-3 mm long, though they are small and easy to feel on pets. They like to crawl on a pet's body, bedding, and the moist yard. They are mostly common around parks, zoos, and places with a lot of animals. Fleas bites pets and people, and they can cause allergies to spread germs.
3. Springtails
They are tiny with soft bodies, usually white or grey, and they hop like tiny fleas. They are small, even less than 2mm. They are found in damp soil, mulch, leaf piles, and potted plants. Mostly common in wet gardens and shady yards in counties across Jacksonville, such as Duval County, Baker County, Nassau County, etc. Most of them are a nuisance; they do not bite people and don't spread disease, yet they are annoying.