a mountain is a sink of adult / snail
virginia_fringed_mountain_snail is not snail. oahu_tree_snail is not land_snail. oahu_tree_snails is snail. land_snail is snail. sea_snail is snail. magazine_mountain_shagreen is snail. virginia_fringed_mountain_snail is snail. oahu_tree_snail is land_snail. oahu_tree_snails is not snail.