[CrazyIvan]

“Can’t explain unless we involve humans??.....Ridiculous”

Agreed. Just build a farm pond in Ill. and soon you will have all sorts of wildlife (including snails) that couldn't make the trip alone. The eggs are transported by waterfowl.

[Sacajaweau]

My kids have a pond on their property in the southern tier of NYS.

The geese found it. What a pain...and cr** all over the place.

Then there's the bazillion frogs....