The snail leech
The snail leech lives in the ditch and pond, hunting
for the pondsnail and great ramshorn. The pond snail
also hunts for fresh water molluscs and worms, like tubifex.
The snail leech belongs to the group of hirundiae.
This leech can't swim and moves slowly on the bottom of
the pond. Its length is mostly between one or 2 cm.
live in a pond
The snail leech lives in the same niche as Helobdella stagnalis
another leech and hunts for the same prey, leeches and molluscs.
Both leeches are equal in there succesrate of killing snails and
mollucs. But Helobdella stagnalis is much smaller and a active
hunter, as the snail leech just wait in ambush.