Stagnicola walkeriana belongs the the family Lymnaeidae, snails that are typically more herbivorous than those of other families. S. walkeriana  eats mostly algae that it scrapes from rocks with its radula (EOL). Some Lymnaeidae  float upside down on surface film and collect microscopic food (Morton).

Click here to see a close-up of a snail using its radula!

Now you know what the snail eats, but where do baby snails come from?