shells
I only ever recall seeing small snail shells but these are large… if I had picked one up it would have filled my palm. Since they were around the SWM pond on the floodplain, I am guessing these are aquatic snail shells, but its hard to tell… the Internet is insistent on telling me how to kill slugs and snails but doesn’t seem to care about which, or where they are. They look most like the Giant African snails (presumably an invasive species. Maybe somebody’s aquarium got dumped and they proliferated.
If these large shells are from freshwater snails, what I have learned is that the animals must have died, as snails don’t leave their shells when they’re alive.