Leeches are annelids comprising the subclass Hirudinea. There are freshwater, terrestrial, and marine leeches. Like the Oligochaeta, they share the presence of a clitellum. Like earthworms, leeches are hermaphrodites. Some, but not all, leeches are hematophagous.
Haemophagic leeches attach to their hosts and remain there until they become full, at which point they fall off to digest. A leech's body is composed of 34 segments. They all have an anterior (oral) sucker formed from the first six segments of their body, which is used to connect to a host for feeding, and also release an anesthetic to prevent the host from feeling the leech. They use a combination of mucus and suction (caused by concentric muscles in those six segments) to stay attached and secrete an anti-clotting enzyme, hirudin, into the host's blood stream.
Leeches are generally aggresive because of their carnivorous behavior.
Leeches are attracted to warmth, movement, and the carbon dioxide released by animals or humans. They can also be attracted to vibrations in the water caused by potential hosts swimming or wading.
maggots are baby flies leeches live off blood from animals
humans
In most cases humans get herpes from contact with other humans rather than from contact with leeches. It is technically possible for the virus to be transmitted by a leech, but it is extremely uncommon.
Leeches are flat worm-like animals found in ponds and lakes. To keep leeches under control in a water setting, it is important to have fish around that will eat the leeches. Redear sunfish are good leech eaters.
leeches
Earthworms and leeches.
Leeches are the class of annelids that has suckers. They use these to suck the blood out of humans and animals in order for them to survive.
You
people and animals blood
leeches will latch onto you and suck your blood.