C. darwini may refer to:
Caerostris darwini, Darwin's bark spider Calosima darwini, Adamski & Landry, 1997, a moth species Canthidium darwini Carios darwini Cavernulina darwini Centrodora darwini Ceratina darwini Chelonoidis darwini a species of Galápagos tortoise Chionelasmus darwini Cleonus darwini Cryptocercus darwini, a cockroach species in the genus Cryptocercus
See also C. darwinii (disambiguation) Darwini (disambiguation)