Aphodius haemorrhoidalis (Linnaeus, 1758)
Common throughout S. England becoming rarer in the north and absent from Scotland. This species is found in various types of dung; in our area collected from cattle dung on Croxley Moor and Sarratt Bottom and horse dung from Whippendell Wood. Britton records sheep droppings in dry pastures. The first adults may be found in May and by June they are abundant, remaining so until mid August when, depending on season, numbers fall. By late September they only occasionally found, thereafter in winter flood refuse.

The combination of small size, 3-5.5mm, and elongate scutellum (≥ 20% of sutural length), will identify this species. In the field it is usually obvious from size and colour; completely black with elytral apices, humeral area and tarsi red. Head finely punctate. Clypeus rounded and strongly bordered anteriorly, with a small lateral expansion in front of eyes. Tuberculate behind eyes but sometimes evanescent. Pronotum with large and small punctures (X20), strongly bordered laterally and basally and with front angles produced. Scutellum densely punctate. Elytra finely punctate and somewhat shining between broad, punctate striae. Extent and intensity of red coloration varies.

Description from 6 Watford specimens at X20