Leeches are on 2 different episodes, and are #5 on Bloodsuckers, and #3 on Psychics. They have light sensitive cells, which makes them able to detect moving shadows and dropping on to anything below. If they don't get a direct hit, they will follow your scent trail. They have three jaws and three hundred teeth. They can drink five times their own body weight in blood. Doctors in hospitals use them to extract blood from their patients painlessly. They are also rumored to predict storms. This is True... thanks to oxygen. They breath through their skin, and when a storm comes, higher air pressure makes the oxygen go up to the surface. So the leeches go up to the surface where oxygen is more abundant.
- If following the countdown of extreme Bloodsuckers, here is a link to the next contender, which is a bloodthirsty assassin that strikes in the night.
- If following the countdown of extreme Psychics, here is a link to the next contender, in which a natural disaster sent it heading for the hills.