many mediterranean sand snails theba pisana hanging on a white wall in the midday heat in porthcurno southern england

food invertebrate produce wood animal leaf wildlife seafood carving insect dish tree plant rock flower soil branch mediterranean sand snail theba pisana wall heat endure shell white brown stripes wait mollusk mollusca southern england porthcurno macro snails hanging midday any snail pisana wall heat endure shell white brown stripes wait mollusk mollusca england