Bug Identifier
Flatworm (possibly land planarian)
Community identification

Flatworm (possibly land planarian)

Geoplanidae (family)

Order & Family
Order: Tricladida; Family: Geoplanidae
Size
Highly variable; can be from a few millimeters to several centimeters long (approx. 5-100mm depending on species).
See this bug in the Encyclopedia

Natural Habitat

Damp, cool environments like under rocks, logs, and leaf litter; also found in gardens and greenhouses.

Diet & Feeding

Carnivorous and predatory; they eat earthworms, snails, slugs, and other small invertebrates.

Behavior Patterns

Nocturnal; they move by gliding on a film of mucus using tiny hairs (cilia). They are hermaphrodites and some can reproduce through fragmentation.

Risks & Benefits

Benefits: Help control invasive snail or slug populations. Risks: Some invasive species (like the Hammerhead Flatworm) can contain neurotoxins (tetrodotoxin) and can significantly harm beneficial earthworm populations. Should not be handled with bare hands.