Species
Taxa with community-verified observations in Door County.
| Photograph | Species | Observations | Years | First | Most Recent |
|---|---|---|---|---|---|
  | Quagga Mussel Dreissena bugensis | 43 | 8 | 2007-08-19 | 2025-10-13 |
  | Leopard Slug Limax maximus | 23 | 12 | 2014-07-31 | 2025-10-05 |
  | Zebra Mussel Dreissena polymorpha | 16 | 4 | 2018-08-30 | 2025-10-06 |
  | Dreissena mussels Dreissena genus | 14 | 8 | 2007-08-18 | 2025-08-16 |
  | Amber Snails Succineidae family | 10 | 6 | 2017-07-14 | 2025-07-12 |
  | Arion Slugs Arion genus | 5 | 5 | 2016-09-07 | 2024-06-30 |
  | Fatmucket Lampsilis siliquoidea | 5 | 4 | 2018-08-30 | 2022-08-08 |
  | Dusky Slugs Mesarion subgenus | 5 | 3 | 2019-05-24 | 2023-10-16 |
  | Roundback Slugs and Allies Arionoidea superfamily | 4 | 2 | 2016-09-07 | 2021-06-01 |
  | Lymnaea jugularis | 4 | 3 | 2021-10-02 | 2024-09-23 |
  | Broad-banded Forestsnail Allogona profunda | 2 | 2 | 2016-06-13 | 2020-08-31 |
  | Helicina suborder | 2 | 2 | 2021-08-24 | 2023-08-10 |
  | Cherrystone Drop Hendersonia occulta | 2 | 1 | 2025-06-26 | 2025-08-25 |
  | Polygyridae family | 2 | 1 | 2021-06-28 | 2021-09-04 |
  | Gastrodontoidea superfamily | 1 | 1 | 2026-07-11 | 2026-07-11 |
  | Gastropods Gastropoda class | 1 | 1 | 2022-05-24 | 2022-05-24 |
  | Ladislavella genus | 1 | 1 | 2022-08-02 | 2022-08-02 |
  | Pond Snails, Bladder Snails, and Allies Lymnaeoidea superfamily | 1 | 1 | 2026-07-29 | 2026-07-29 |
  | Eastern Whitelip Neohelix albolabris | 1 | 1 | 2012-07-08 | 2012-07-08 |
  | Planorbella genus | 1 | 1 | 2021-10-02 | 2021-10-02 |
  | Bellmouth Ramshorn Planorbella campanulata | 1 | 1 | 2025-04-27 | 2025-04-27 |
  | Ramshorn Snails and Allies Planorbidae family | 1 | 1 | 2025-08-24 | 2025-08-24 |
  | Pleuroceridae family | 1 | 1 | 2011-08-02 | 2011-08-02 |
  | Giant Floater Pyganodon grandis | 1 | 1 | 2018-08-30 | 2018-08-30 |
  | River Mussels Unionidae family | 1 | 1 | 2020-07-06 | 2020-07-06 |
Photographs from iNaturalist and Wikimedia Commons, each credited in full on its species page.