helicella itala heath snail on erigeron annuus, tall fleabane, an invasive wild flower

spiral snail small brown hairy snails heath land leaf plantpests damage season helix wildlife plant animal nature shell wild garden summer crawl white biodiversity environmental protection gardening agriculture environment mollusc banded form apical side terestrial europe erigeron annual fleabane annuus daisy field invasive flower uncultivated medical medicine neophyte botany