several yellow aphids on plant

    Aphids

    More than 1,300 species in North America north of Mexico
    Photo of backswimmer, side view

    Backswimmers

    About 32 North American species in the family Notonectidae
    image of a Leafhopper on leaf

    Leafhoppers

    More than 3,000 species in North America north of Mexico
    Photo of a ramshorn snail on a wet rock.

    Ramshorn Snails

    Gyraulus, Helisoma, Menetus, Micromenetus, Planorbula spp.
    Cryptorhynchus weevil viewed from side

    Weevils (Snout Beetles; Bark Beetles)

    About 2,500 species in North America north of Mexico