Species Recorded | Taxon | Scientific Name | Common Name | Records | Latest |
| alder fly, lacewing or snake fly | Wesmaelius (Kimminsia) | an insect - lacewing (Neuroptera) | 1 | 2022 |
| alder fly, lacewing or snake fly | Wesmaelius (Kimminsia) nervosus | a brown lacewing | 4 | 2000 |
| alder fly, lacewing or snake fly | Wesmaelius (Kimminsia) subnebulosus | a brown lacewing | 3 | 2000 |
| ant, bee, wasp, sawfly or ichneumon (and others) | Woldstedtius biguttatus | an ichneumon wasp | 3 | 2008 |
| ant, bee, wasp, sawfly or ichneumon (and others) | Woldstedtius citropectoralis | an ichneumon wasp | 1 | 2009 |
| ant, bee, wasp, sawfly or ichneumon (and others) | Woldstedtius flavolineatus | an ichneumon wasp | 3 | 2008 |
| caddis fly | Wormaldia occipitalis | a caddisfly | 2 | 2019 |
| moss | Weissia brachycarpa | Small-mouthed Beardless-moss | 18 | 2022 |
| moss | Weissia brachycarpa var. obliqua | Oblique-mouthed Beardless-moss | 2 | 2023 |
| moss | Weissia controversa | Green-tufted Stubble-moss | 14 | 2021 |
| moss | Weissia controversa var. controversa | a green-tufted stubble-moss | 6 | 2015 |
| moss | Weissia controversa var. crispata | Crisped Stubble-moss | 1 | 2016 |
| moss | Weissia longifolia | Crisp Beardless-moss | 2 | 2020 |
| moss | Weissia longifolia var. angustifolia | Narrow-leaved Beardless-moss | 3 | 2023 |
| moss | Weissia longifolia var. longifolia | a crisp beardless-moss | 1 | 1983 |
| moth or butterfly - macro moth | Watsonalla | a Watsonalla species (unidentified) | 28 | 2024 |
| moth or butterfly - macro moth | Watsonalla binaria | Oak Hook-tip | 378 | 2025 |
| moth or butterfly - macro moth | Watsonalla cultraria | Barred Hook-tip | 133 | 2023 |
| moth or butterfly - macro moth | Watsonalla uncinula | Spiny Hook-tip | 8 | 2024 |
| plant | Weigela | a Weigela species (unidentified) | 2 | 2023 |
| plant | Weigela florida | Weigelia | 2 | 2023 |
| plant | Wolffia arrhiza | Rootless Duckweed | 124 | 2014 |
| spider | Walckenaeria | a Walckenaeria species (unidentified) | 1 | 2009 |
| spider | Walckenaeria acuminata | a money spider | 6 | 2018 |
| spider | Walckenaeria alticeps | a money spider | 1 | 2013 |
| spider | Walckenaeria antica | a money spider | 4 | 2000 |
| spider | Walckenaeria atrotibialis | a money spider | 1 | 1985 |
| spider | Walckenaeria cuspidata | a money spider | 2 | 1996 |
| spider | Walckenaeria dysderoides | a money spider | 1 | 1996 |
| spider | Walckenaeria monoceros | a money spider | 1 | 1985 |
| spider | Walckenaeria nudipalpis | a money spider | 7 | 2003 |
| spider | Walckenaeria unicornis | a money spider | 1 | 1985 |
| spider | Walckenaeria vigilax | a money spider | 2 | 2004 |
| spider | Wiehlea calcarifera | a money spider | 1 | 1984 |
| springtail | Willowsia platani | a springtail (Collembola) | 3 | 2025 |
| true fly - (diptera) | Wachtliella caricis | an insect - true fly (Diptera) | 1 | 2022 |