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Of the 650 species of leech listed, Hirudo medicinalis is one of the most extensively studied. This annelid from the subclass Hirudinea has 2 suckers, one housing the mouth and its 3 jaws. It lives mainly in the stagnant waters of marshes and ponds. When it comes to reproduction, the animal is a hermaphrodite. Inseminated leeches lay their eggs during the spring and summer months, outside the water, with cocoons containing as many as thirty young.
1 The Carolina Anole or Green Anole is a very interesting type of Lizard. 2  Another name that you may hear it called by is the American Chameleon. 3  Chameleon. 4  The Chameleon is a very popular type of Lizard due to the fact that it has the ability to change colors based on location. Gecko. 2  The Gecko is a very small species of Lizard. 3  There are more than 1,500 different subspecies. 4  Gila Monster. 5  The Gila Monster is one species of Lizard that people are afraid of. 6  Green Iguana. 7  The Green Iguana is often referred to as the Common Iguana.