Snails

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  There are more than 30 freshwater snails (molluscs) in the UK, ranging in size from around 3 mm (nautilus ramshorn – Gyraulus crista) to 7 mm (dwarf pond – Galba truncatula) up to about 35 mm (great ramshorn – … Continued

Stoneflies

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There are 34 species of stoneflies (Plecoptera) in Britain. Stoneflies prefer well oxygenated water associated with rocky rivers and streams and occasionally the rocky shores of lakes. I encountered a sporadic hatch of stoneflies in early spring at Lynnau Gamallt … Continued

Dung fly

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The yellow dung fly (Scathophaga stercoraria) can be a significant terrestrial where animal droppings (horse, sheep, cow) are present in pasture next to rivers and lakes during the spring/summer months. These flies are about 10 mm in length and have … Continued