# Leech (*Hirudo medicinalis*) Leeches are small, slimy creatures that live in water. They have suckers at both ends of their bodies and use them to move and feed. - **Category:** [Invertebrate](https://www.snappit.app/explore/categories/invertebrate) - **Rarity:** Common - **Danger:** 2/5 · Low - **Habitat:** Freshwater - **Also known as:** Hirudo, Medicinal Leech ![Leech](https://media.snappit.app/site-media-v1/caf23867b9ab5a006343dcb8bb2aaa2f364d975b70663a3c1ec00a259728ae2c/image-560x560/w-560.webp) ## Appearance The Leech has a soft, segmented body, usually greenish-brown or olive with reddish stripes on its back. It has two powerful suckers, one at each end, allowing it to move and attach firmly. Its flattened, worm-like shape helps it glide through water. ## Taxonomy - **Class:** Clitellata - **Order:** Arhynchobdellida - **Family:** Hirudinidae - **Genus:** Hirudo ## Interesting facts - Leeches have multiple pairs of eyes, usually between 2 and 10 pairs! - Many leeches don't eat blood; some hunt snails, worms, or even tiny insects! - Some leeches can survive for months or even over a year without eating! - The largest leech ever found was nearly 2 feet long! Wow! ## Special abilities - **Stealthy Feeder:** Leech can release a natural anesthetic into its host's skin, helping it feed undetected and without causing pain. - **Blood-Sucking Superpower:** Leech has strong suckers and three sharp, Y-shaped jaws that help it attach firmly and make a small, precise incision. - **Elastic Belly:** Leech has an incredibly stretchy body that allows it to consume many times its own weight in blood in one feeding session. - **Healing Helper:** Leech can release special compounds that prevent blood clotting and improve blood flow, used in medical procedures. ## Measurements & details - **Size:** 10-250 mm - **Lifespan:** 1825-3650 days - **Leg Count:** 0 ## Diet & Feeding Many leeches are carnivores, but some drink blood from other animals to survive! - **Primary Foods:** blood (fish), blood (mammals), worms, snails, insect larvae, tadpoles - **Foraging Method:** Ambush ## Ecological connections - **Parasitizes:** [Cattle](https://www.snappit.app/explore/cattle) (*Bos taurus*) — Leeches attach to cattle drinking water. - **Eaten by:** Mallard Duck (*Anas platyrhynchos*) — Ducks sometimes eat leeches found in ponds. - **Hunts:** [Earthworm](https://www.snappit.app/explore/earthworm) (*Lumbricus terrestris*) — Many leech species hunt and eat earthworms. - **Parasitizes:** Common Frog (*Rana temporaria*) — Some leeches attach to frogs for a blood meal. ## Traits - [Wildlife](https://www.snappit.app/explore/traits/wildlife): Wildlife encompasses all undomesticated animal and plant life existing in their natural habitats. - [Filter Feeder](https://www.snappit.app/explore/traits/filter-feeder): Filter feeders obtain nutrients by straining suspended food particles and small organisms from water. - [Ancient Lineage](https://www.snappit.app/explore/traits/ancient-lineage): This trait signifies organisms belonging to a very old evolutionary group with ancestors dating back millions of years. - [Carnivorous](https://www.snappit.app/explore/traits/carnivorous): This trait identifies organisms whose diet consists entirely or primarily of animal tissue. - [Freshwater](https://www.snappit.app/explore/traits/freshwater): Freshwater habitats include non-saline aquatic environments such as rivers, lakes, ponds, and wetlands, vital for numerous species. - [Regenerative](https://www.snappit.app/explore/traits/regenerative): Regenerative organisms possess the ability to regrow lost or damaged body parts, tissues, or organs. - [Parasitic](https://www.snappit.app/explore/traits/parasitic): This trait describes organisms that live on or in a host organism, obtaining nutrients at the host's expense. - [Vampiric](https://www.snappit.app/explore/traits/vampiric): Vampiric organisms are those that obtain nutrients by feeding on the blood or bodily fluids of other animals. - [Nocturnal](https://www.snappit.app/explore/traits/nocturnal): Nocturnal animals are primarily active during the nighttime hours, typically resting or sleeping during the day. ## Collections - [Insects](https://www.snappit.app/explore/collections/insects) ## Safety **Danger:** 2/5 · Low If you see a leech in the water, don't touch it. Ask an adult for help. ## Frequently Asked Questions ### How to identify Leech? Compare body symmetry, shells, segments, legs, tentacles and how the animal moves. Invertebrates span many unrelated groups, so start with body structure. Invertebrate Identifier: upload a photo and compare the visible details. ### How big is Leech? 10-250 mm ### How long does Leech live? 1825-3650 days ### What does Leech eat? Many leeches are carnivores, but some drink blood from other animals to survive! ### Where is Leech usually found? Freshwater ### How does Leech hunt? Ambush ### How many legs does Leech have? 0 ## More Invertebrate - [Coral](https://www.snappit.app/explore/coral) - [Crab Spider](https://www.snappit.app/explore/crab-spider) (*Mecaphesa asperata*) - [Garden Spider](https://www.snappit.app/explore/garden-spider) (*Araneus diadematus*) - [Brown Recluse Spider](https://www.snappit.app/explore/brown-recluse-spider) (*Loxosceles reclusa*) --- Source: [Leech: Characteristics, Facts & Places to See — Snappit](https://www.snappit.app/explore/leech)