Snail behaviour

Snail behaviour

Observation - Snail behaviour. Description: I think this is a Roman Snail. It was one of many that had climbed trees to a height of six feet in a copse of trees. No more than one or two on each tree. Can anyone explain the behaviour please. The ground under the trees was well drained and dry. What

I think this is a Roman Snail. It was one of many that had climbed trees to a height of six feet in a copse of trees. No more than one or two on each tree. Can anyone explain the behaviour please. The ground under the trees was well drained and dry. What makes them all climb at this time of year??