Websites
- http://www.ehow.com/about_6739035_life-cycle-leeches.html
- http://www.ncbi.nlm.nih.gov/pubmed/19731093
- http://www.biokids.umich.edu/critters/Hirudinea/
- http://www.fcps.edu/islandcreekes/ecology/freshwater_leech.htm
- http://www.biopharm-leeches.com/
- http://shapeoflife.org/video/behavior/annelids-leeches
http://www.biology4kids.com/files/systems_excretory.html
http://www.uaex.edu/wneal/pond_management/pages/topics/leeches.html
http://kids.discovery.com/tell-me/animals/bug-world/worm-world/what-are-leeches
http://eol.org/pages/52310/overview
http://mobilestreams.org/content/leech-macrobdella-decora
http://www.leeches.biz/leech-therapy.htm
http://www.almaany.com/home.php?language=english&lang_name=Arabic&word=American+leech++%3D++Macrobdella+decora&category=Medical
http://www.marinespecies.org/aphia.php?p=taxdetails&id=160023
http://animaldiversity.ummz.umich.edu/accounts/Hirudinea/
- http://www.ncbi.nlm.nih.gov/pubmed/19731093
- http://www.biokids.umich.edu/critters/Hirudinea/
- http://www.fcps.edu/islandcreekes/ecology/freshwater_leech.htm
- http://www.biopharm-leeches.com/
- http://shapeoflife.org/video/behavior/annelids-leeches
http://www.biology4kids.com/files/systems_excretory.html
http://www.uaex.edu/wneal/pond_management/pages/topics/leeches.html
http://kids.discovery.com/tell-me/animals/bug-world/worm-world/what-are-leeches
http://eol.org/pages/52310/overview
http://mobilestreams.org/content/leech-macrobdella-decora
http://www.leeches.biz/leech-therapy.htm
http://www.almaany.com/home.php?language=english&lang_name=Arabic&word=American+leech++%3D++Macrobdella+decora&category=Medical
http://www.marinespecies.org/aphia.php?p=taxdetails&id=160023
http://animaldiversity.ummz.umich.edu/accounts/Hirudinea/