Fig 6. Chimpanzees in Bulindi commonly swallow whole bristly leaves of Aneilema nyasense C.B. Clarke (Commelinaceae).

(a) A. nyasense growing in riverine forest in Bulindi. (b) 30 undigested and unchewed leaves of A. nyasense recovered from one chimpanzee faecal specimen; the leaves are passed in faeces folded one or more times, but have been unfolded manually here for identification. No adult worms were observed together with the leaves in this faecal sample.