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Leopard Slug
Limax maximus
366 observations
Milky Slug
Deroceras reticulatum
148 observations
Western Pearlshell
Margaritifera falcata
83 observations
Idaho Forestsnail
Allogona ptychophora
75 observations
Garden Snail
Cornu aspersum
66 observations
Asian Clam
Corbicula fluminea
63 observations
Rocky Mountainsnail
Oreohelix strigosa
58 observations
Western Banded Tigersnail
Anguispira occidentalis
47 observations
Robust Lancetooth Snail
Haplotrema vancouverense
37 observations
Threeband Slugs
Ambigolimax
31 observations
Western Ridged Mussel
Gonidea angulata
24 observations
Black Slug
Arion ater
21 observations
Glossy Pillar
Cochlicopa lubrica
19 observations
Chinese Mystery Snail
Margarya chinensis
19 observations
Draparnaud's Glass Snail
Oxychilus draparnaudi
17 observations
Pacific Banana Slug
Ariolimax columbianus
14 observations
Green River Pebblesnail
Fluminicola coloradoensis
12 observations
New Zealand Mudsnail
Potamopyrgus antipodarum
11 observations
Reticulate Taildropper
Prophysaon andersonii
11 observations
Great Basin Ramshorn
Helisoma newberryi
10 observations
Costate Mountainsnail
Oreohelix idahoensis
10 observations
Bear Lake Springsnail
Pyrgulopsis pilsbryana
9 observations
Meadow Slug
Deroceras laeve
9 observations
Pale Jumping-slug
Hemphillia camelus
9 observations
Smoky Taildropper
Prophysaon humile
9 observations
Lymnaea jugularis
Lymnaea jugularis
9 observations
Thinlip Tightcoil
Pristiloma idahoense
7 observations
Acute Bladder Snail
Physella acuta
7 observations
Western Dusky Slug
Arion subfuscus
6 observations
Brown-lipped Snail
Cepaea nemoralis
5 observations
Boulder Pile Mountainsnail
Oreohelix jugalis
5 observations
Big-eared Radix
Radix auricularia
5 observations
Marbled Jumping-slug
Hemphillia danielsi
5 observations
Lyrate Mountainsnail
Oreohelix haydeni
5 observations
Pellucid Glass-snail
Vitrina pellucida
5 observations
Winged Floater
Anodonta nuttalliana
3 observations
Coeur d'Alene Oregonian
Cryptomastix mullani
3 observations
Rocky Mountain Axetail
Securicauda hermani
3 observations
Striated Fingernailclam
Sphaerium striatinum
3 observations
Purple-Nacre Clam
Corbicula largillierti
3 observations
Roman Snail
Helix pomatia
2 observations
Marsh Ramshorn
Planorbella trivolvis
2 observations
Forest Disc
Discus whitneyi
2 observations
Grooved Fingernailclam
Sphaerium simile
2 observations
Sheathed Slug
Zacoleus idahoensis
2 observations
Quick Gloss Snail
Zonitoides arboreus
2 observations
fasciatus-group Arion Slugs
Carinarion
2 observations
Lance Aplexa
Sibirenauta elongata
2 observations
Utah roundmouth snail
Valvata utahensis
1 observations
Mimic Lymnaea
Pseudosuccinea columella
1 observations
Frequently Asked Questions
- The 10 most common molluscs in Idaho are:
- Leopard Slug (Limax maximus)
- Milky Slug (Deroceras reticulatum)
- Western Pearlshell (Margaritifera falcata)
- Idaho Forestsnail (Allogona ptychophora)
- Garden Snail (Cornu aspersum)
- Asian Clam (Corbicula fluminea)
- Rocky Mountainsnail (Oreohelix strigosa)
- Western Banded Tigersnail (Anguispira occidentalis)
- Robust Lancetooth Snail (Haplotrema vancouverense)
- Threeband Slugs (Ambigolimax)
- The most observed mollusc in Idaho is Leopard Slug (Limax maximus), with 366 recorded observations.