Phrynops hilarii

An omnivorous species, P. hilarii mainly feeds on arthropods, with a preference for copepods, ostracods, and hemipterans.^[8] It feeds also on fishes, reptiles, birds, small mammals, and carrion.^{[citation needed]} It is oviparous.^[5] This turtle can live for up to 37 years.^[9]

Females lay eggs twice a year, one clutch between February and May and the other between September and December.^{[citation needed]} They lay from 9 to 14 eggs, with a maximum of 32 eggs and an incubation period of approximately 150 days.^{[citation needed]}

• Boulenger, George Albert (1889). Catalogue of the Chelonians, Rhynchocephalians, and Crocodiles in the British Museum (Natural History). New Edition. London: Trustees of the British Museum (Natural History). (Taylor and Francis, printers). x + 311 pp. + Plates I-III. (Hydraspis hilarii: p. 220, figure 59, three views of skull; p. 221, figure 60, carapace and plastron; p. 222, species description).