Chalk streams
Chalk streams are globally rare and unique rivers, with the vast majority found in southern and eastern England.
Chalk streams are fed by pure, filtered groundwater from chalk aquifers. Their stable flow, cool, clear, mineral-rich water, and clean gravel beds create an exceptionally productive and specialized habitat for a diverse range of wildlife, including wild trout and water voles.
Associated species
12 species recorded from Greater Lincolnshire in the last 25 years 13 recorded from Greater Lincolnshire all time
| common name | scientific name | occurrences | earliest | latest | |||
|---|---|---|---|---|---|---|---|
| Drupenatus nasturtii | Drupenatus nasturtii (Germar, 1823) |
21 | 1951 | 2018 |
|
| common name | scientific name | occurrences | earliest | latest | |||
|---|---|---|---|---|---|---|---|
| White-clawed Crayfish | Austropotamobius pallipes (Lereboullet, 1858) |
1,116 | 1900 | 2024 |
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| Trichoniscoides albidus | Trichoniscoides albidus (Budde-Lund, 1880) |
9 | 1993 | 2023 |
|
| common name | scientific name | occurrences | earliest | latest | |||
|---|---|---|---|---|---|---|---|
| Scarce Chaser | Libellula fulva Müller, 1764 |
13 | 1917 | 2021 |
|
| common name | scientific name | occurrences | earliest | latest | |||
|---|---|---|---|---|---|---|---|
| Tipula marginella | Tipula marginella Theowald, 1980 |
2 | 2008 | 2008 |
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| Cheilotrichia imbuta | Cheilotrichia imbuta (Meigen, 1818) |
1 | 1972 | 1972 |
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| Helius pallirostris | Helius pallirostris Edwards, 1921 |
9 | 1986 | 2015 |
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| Bright Four-spined Legionnaire | Chorisops nagatomii Rozkošný, 1979 |
6 | 2011 | 2022 |
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| Dark-winged Soldier | Oxycera analis Wiedemann in Meigen, 1822 |
2 | 2011 | 2011 |
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| White-barred Soldier | Oxycera morrisii Curtis, 1833 |
148 | 1971 | 2019 |
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| Silver Colonel | Odontomyia argentata (Fabricius, 1794) |
9 | 2016 | 2022 |
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