Out of the 50 species of leeches found in Michigan, how many attach themselves to humans?

The correct answer is four species of leeches that are known to attach themselves to humans in Michigan. While there are numerous species of leeches inhabiting Michigan's waters, only a limited number are capable of attaching themselves to humans and feeding on blood. These four species have adapted to being opportunistic feeders, taking advantage of the presence of humans or other warm-blooded animals suitable for their feeding needs. This understanding of leech behavior is important for aquatic pest management, particularly in contexts such as recreational activities in freshwater environments where encounters might occur. Recognizing the specific species that pose a potential risk allows for better awareness and mitigation strategies to prevent discomfort or health concerns associated with leech bites.