Hemingway, in The Short Happy Life of Francis Macomber, wrote that the PH, named only Wilson, is described as having "…flat, blue machine-gunner's eyes." It takes a degree of insight and experience of the world and imagination to describe the pitiless stare of someone whose trade involves dealing in death every day in that particular fashion. That is why there was only one Hemingway.
Robert Ruark, in Horn of the Hunter, described a Cape buffalo as a "vast, scabby, tick-covered destruction." I read those words for the first time more than 60 years ago and I can still quote them. Three adjectives and a noun and they give you old nyati complete. No one but Ruark could have done it.