- Hi there, i have two questions to ask. My first question is what i describe a Leech? Okay i live in the Blue Mountains NSW and go on lots of bush walks and can get these leech like creatures attaching themselves to me near or in damp areas. They especially attach themselves to my legs and from then on they begin to suck my blood. These leech like creatures look like leeches and are coloured black with one single yellow line running down the middle of them and have two suckers on either end and move like leeches do. My second question is can they get or carry HIV/AIDS or any other diseases and can they infect me with them. If you could answer my questions i would most appreciate it thanks.