Bicyclus anynana is a small brown butterfly in the family Nymphalidae, the most globally diverse family of butterflies. It is primarily found in eastern Africa from southern Sudan to Eswatini. It is found mostly in woodland areas and flies close to the ground. Male wingspans are 35–40 mm and female wingspans are 45–49 mm.

Mud-puddling, or simply puddling, is a behaviour most conspicuous in butterflies, but also occurring in other animals, primarily insects. The organism seeks out nutrients in certain moist substances such as rotting plant matter, mud and carrion, and suck up the fluid. Where the conditions are suitable, conspicuous insects such as butterflies commonly form aggregations on wet soil, dung or carrion. From the fluids they obtain salts and amino acids that play various roles in their physiology, ethology and ecology. This behaviour also has been seen in some other insects like the leafhoppers, e.g. the potato leafhopper, Empoasca fabae.