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Leeches can detect touch, vibration, movement of nearby objects, and chemicals secreted by their hosts; freshwater leeches crawl or swim towards a potential host standing in their pond within a few seconds. Species that feed on warm-blooded hosts move towards warmer objects.
It is found in much of eastern North America in freshwater habitats, although there is one disjunct population in northern Mexico. M. decora is both a parasite of vertebrates, including humans, and an aquatic predator of eggs, larvae, and other invertebrates. Macrobdella decora is a medium-sized leech with a spotted greenish-brown back and a ...
The species of this genus are found in Europe and Northern America. [1] The World Register of Marine Species accepts one species within Cystobranchus. [2] Cystobranchus is also known as a leech, and it is a freshwater leech, usually found in revisers, streams, lakes, and ponds across North America.
Macrobdella is a genus of leeches native to freshwater ecosystems of North America, especially Canada, Mexico, and the United States. [2] The genus is commonly referred to as North American medicinal leeches.
From here it has spread to Australia, Europe and South America. It is a freshwater species. [2] In 2018 it was reported from two widely separated locations in North Carolina, but it is unclear whether these are as a result of two different introductions, or mean that the leech has become widely distributed but has previously been overlooked. [3]
Placobdella parasitica is a species of leech found in North America. [2] Leeches are habitual ectoparasites of vertebrates in aquatic environments. Placobdella parasitica is differentiated from other members of the genus Placobdella by its smooth dorsal surface, simple to complicated pigmentation, and abdomen with 8 to 12 stripes.
Unlike many leeches which are blood-suckers, E. punctata is a predator and scavenger. [3] Among the invertebrates it eats are copepods, midges, earthworms and amphipods.This leech has been observed adhering to a salamander, thus being transported to a new location as well as benefiting from any food scraps discarded by the salamander.
Erpobdella obscura is a freshwater ribbon leech common in North America. It is a relatively large leech and is commonly used as bait by anglers for walleye and other sport fish. In Minnesota, live bait dealers annually harvest over 45,000 kg of bait-leeches, raising concerns of over-harvest. [3]