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Dictyophorus spumans, also knoan as the koppie foam grasshopper, is a species of grasshopper in the family Pyrgomorphidae, indigenous to southern Africa. The name "foam grasshopper" derives from the insect's ability to produce a toxic foam from its thoracic glands, using a combination of hemolymph with air from the grasshopper's spiracles. Adult males are typically 4.5–5 cm (1.8–2.0 in) long and females typically 5–7 cm (2.0–2.8 in), but can grow up to a length of 8 cm (3.1 in). This D. spumans individual was photographed in the Walter Sisulu National Botanical Garden, Roodepoort, South Africa.Photograph credit: Charles J. Sharp