the mammal species named after major p. h. g. powell-cotton can be distinguished by the subspecies name “cottoni” or “powelli”. the specimens collected by major p. h. g. powell-cotton play an important role in scientific studies because the existence of some of the cottoni species are in danger now, for example, the b/w colobus (colobus angolensis cottoni) was rated “least concern” in the iucn red list of threatened species published in 2008. the accounts of major p. h. g. powell-cotton's specimen collection activities can be found in his books and articles. and, there is no difference between some of his writings and adventure stories. for example, in black rhinoceros hunting which is included in big game shooting in africa, he vividly recorded the hunting of a black rhino: