How the Snake Lost Its Legs the butterfly, the snake, and the cheetah. Each consists of three to eight sections named in the style of Rudyard Kipling's "Just So Stories", with titles like "How the butterfly got its spots" or "How the snake elongated its body", though a couple of sections use "Why?" rather than "How?", as in "Why the fly twirls his penis" (it rotates during embryonic development under the control of different genes). In these chapters, Held explains the mechanics of evolutionary developmental biology, complete with accounts of what genes such as hox, hedgehog, and engrailed do to shape bodies. The third part is
Anatolian leopard leopard from the area of Smyrna in western Turkey under the scientific name "Felis tulliana". In the 19th and 20th centuries, the Anatolian leopard was considered a distinct leopard subspecies occurring only in western Turkey. In 2017, "P. p. ciscaucasia" was subsumed to "P. p. tulliana". In 1856, the Anatolian leopard was described as having a grayish, slightly reddish fur with large rosettes on the flanks and back, smaller ones on the shoulder and upper legs, and spots on the head and neck. It is similar in size to the African leopard. The Anatolian leopard was thought to have ranged