# Oregon Forestsnail (*allogona townsendiana*)

The Oregon Forestsnail is a charming and vital member of the Pacific Northwest's temperate rainforests. As one of the region's largest native land snails, this slow-moving gastropod plays an essential role in decomposing organic matter, recycling nutrients back into the forest floor, and acting as a food source for local wildlife. It is closely associated with damp bigleaf maple stands and stinging nettles, which provide both sustenance and shelter. Despite its quiet existence, the Oregon Forestsnail faces significant pressure from habitat fragmentation and urbanization. Finding one among the moss and damp leaf litter is a rewarding experience for any nature enthusiast, offering a unique glimpse into the delicate balance of the forest floor ecosystem.

- **Category:** [Invertebrate](https://www.snappit.app/explore/categories/invertebrate)
- **Rarity:** Common
- **Danger:** 1/5 · Very low
- **Snaps:** 1
- **Habitat:** Typically found in moist, low-elevation deciduous or mixed forests, particularly damp areas heavily populated by bigleaf maple and stinging nettles.

![Oregon Forestsnail](https://inaturalist-open-data.s3.amazonaws.com/photos/1892405/medium.JPG)

Photo: Sam Kieschnick, CC BY 4.0 · [iNaturalist](https://www.inaturalist.org/photos/1892405)

## Appearance

The adult Oregon Forestsnail is easily identified by its relatively large, globose shell, which typically ranges from 2 to 4 centimeters in diameter. The shell is light brown, amber, or straw-colored, characterized by fine, irregular growth wrinkles and spiral striations. A key diagnostic feature is the distinct, thickened white lip surrounding the shell's opening, which develops fully only in mature adults. Its body is a soft, fleshy pale-brown to grayish color with typical retractable tentacles hosting eyes at their tips.

## Taxonomy

- **Kingdom:** Animalia
- **Phylum:** Mollusca
- **Class:** Gastropoda
- **Order:** Stylommatophora
- **Family:** Polygyridae
- **Genus:** Allogona

## Interesting facts

- Like many land snails, they possess 'love darts'—tiny, calcified structures they shoot into potential mates during courtship to increase fertilization success.
- The distinctive white, flared lip of the shell only develops when the snail reaches full adulthood, serving as a biological stamp of maturity.
- This species is considered an ecological indicator of healthy, mature deciduous forest floor ecosystems in the Pacific Northwest.

## Special abilities

- **Epiphragm Seal:** To survive dry summer heat or cold winter periods, the snail seals its shell opening with a temporary, hardened mucus barrier to prevent fatal moisture loss.
- **Stinging Nettle Immunity:** This species can safely crawl over and feed directly on stinging nettle plants, utilizing the irritating hairs as physical protection from larger predators.
- **Soil-Boring Oviposition:** To protect its eggs from drying out or being eaten, the snail uses its muscular foot to dig a shallow chamber in damp soil, burying the clutch safely.

## Measurements & details

- **Length:** 2+ cm
- **Weight:** 0.005+ kg
- **Lifespan:** 4+ years
- **Clutch Size:** 15+
- **Incubation:** 20+ days

## Diet & Feeding

Feeds primarily on living and decaying plant material, showing a strong preference for stinging nettle, as well as fungi and decomposing leaf litter.

- **Primary Foods:** Stinging Nettle, Bigleaf Maple Leaf Litter, Fungi, Decaying Vegetation
- **Foraging Method:** Grazing

## Ecological connections

- **Host plant:** Stinging Nettle (*Urtica dioica*) — Feeds directly on the leaves of this plant, which also serves as its primary shelter and protection.
- **Eaten by:** Robust Lancetooth Snail (*Haplotrema vancouverense*) — A specialized predatory snail that hunts and consumes the Oregon Forestsnail.
- **Eaten by:** [Varied Thrush](https://www.snappit.app/explore/varied-thrush) (*Ixoreus naevius*) — Searches the damp leaf litter, preying on juvenile and adult snails.

## Safety

**Danger:** 1/5 · Very low

No special safety notes yet.

## Frequently Asked Questions

### How to identify Oregon Forestsnail?

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 long is Oregon Forestsnail?

2+ cm

### How much does Oregon Forestsnail weigh?

0.005+ kg

### How long does Oregon Forestsnail live?

4+ years

### What does Oregon Forestsnail eat?

Feeds primarily on living and decaying plant material, showing a strong preference for stinging nettle, as well as fungi and decomposing leaf litter.

### Where is Oregon Forestsnail usually found?

Typically found in moist, low-elevation deciduous or mixed forests, particularly damp areas heavily populated by bigleaf maple and stinging nettles.

### How does Oregon Forestsnail hunt?

Grazing

### How many eggs does Oregon Forestsnail lay?

15+

## Where to spot

- [Lower Cushman Dam](https://www.snappit.app/guides/places/lower-cushman-dam) — Washington, US · Historic Site

## 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*)

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Source: [Oregon Forestsnail: Facts & Places to See — Snappit](https://www.snappit.app/explore/oregon-forestsnail)