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Leopard Slug
Limax maximus
265 observations
Asian Clam
Corbicula fluminea
114 observations
Eastern Pondmussel
Sagittunio nasutus
62 observations
Chinese Mystery Snail
Margarya chinensis
62 observations
Eastern Elliptio
Elliptio complanata
59 observations
Milky Slug
Deroceras reticulatum
48 observations
Tidewater Mucket
Atlanticoncha ochracea
47 observations
Eastern Floater
Pyganodon cataracta
45 observations
Paper Pondshell
Utterbackia imbecillis
44 observations
Alewife Floater
Utterbackiana implicata
44 observations
Brown-lipped Snail
Cepaea nemoralis
26 observations
Northern Lance
Elliptio fisheriana
23 observations
Rounded Snail
Gonyodiscus rotundatus
20 observations
Eastern Lampmussel
Lampsilis radiata
19 observations
Carolina Mantleslug
Philomycus carolinianus
15 observations
Japanese Mystery Snail
Heterogen japonica
11 observations
Eastern Oyster
Crassostrea virginica
8 observations
Changeable Mantleslug
Megapallifera mutabilis
8 observations
Glossy Pillar
Cochlicopa lubrica
8 observations
Globose Dome Snail
Ventridens ligera
7 observations
Western Dusky Slug
Arion subfuscus
6 observations
Piedmont Elimia
Elimia virginica
6 observations
White-lip Globe Snail
Mesodon thyroidus
5 observations
Garden Arion
Arion hortensis
5 observations
Meadow Slug
Deroceras laeve
5 observations
Hedgehog Slug
Arion intermedius
5 observations
Quick Gloss Snail
Zonitoides arboreus
5 observations
Long Fingernailclam
Sphaerium transversum
5 observations
Invasive
Budapest Slug
Tandonia budapestensis
4 observations
Marsh Ramshorn
Planorbella trivolvis
3 observations
Flamed Tigersnail
Anguispira alternata
2 observations
Mud Bithynia
Bithynia tentaculata
1 observations
Giant Floater
Pyganodon grandis
1 observations
Dusky Ancylid
Laevapex fuscus
1 observations
Compound Coil
Helicodiscus parallelus
1 observations
Coastal Plain Disk
Anguispira fergusoni
1 observations
Asian Tramp Snail
Bradybaena similaris
1 observations
Pointed Campeloma
Campeloma decisum
1 observations
Minute Gem
Hawaiia minuscula
1 observations
Greenhouse Slug
Milax gagates
1 observations
Draparnaud's Glass Snail
Oxychilus draparnaudi
1 observations
Foster Mantleslug
Pallifera fosteri
1 observations
Toga Mantleslug
Philomycus togatus
1 observations
Hairy Slitmouth
Stenotrema hirsutum
1 observations
Atlantic Threetooth
Triodopsis juxtidens
1 observations
Costate Vallonia
Vallonia costata
1 observations
Invasive
Pinhead Spot Snail
Paralaoma servilis
1 observations
Acute Bladder Snail
Physella acuta
1 observations
Striped Greenhouse Slug
Ambigolimax valentianus
1 observations
Slender Amber Snail
Oxyloma elegans
1 observations
Frequently Asked Questions
- The 10 most common molluscs in District of Columbia are:
- Leopard Slug (Limax maximus)
- Asian Clam (Corbicula fluminea)
- Eastern Pondmussel (Sagittunio nasutus)
- Chinese Mystery Snail (Margarya chinensis)
- Eastern Elliptio (Elliptio complanata)
- Milky Slug (Deroceras reticulatum)
- Tidewater Mucket (Atlanticoncha ochracea)
- Eastern Floater (Pyganodon cataracta)
- Paper Pondshell (Utterbackia imbecillis)
- Alewife Floater (Utterbackiana implicata)
- The most observed mollusc in District of Columbia is Leopard Slug (Limax maximus), with 265 recorded observations.
- Some of the most commonly observed invasive molluscs in District of Columbia include:
- Budapest Slug (Tandonia budapestensis)
- Pinhead Spot Snail (Paralaoma servilis)