(Atheris squamigera) variable bush viper
‘It can’t be helped, Sam,’ said Frodo sadly. He had suddenly realized that flying from the Shire would mean more painful partings than merely saying farewell to the familiar comforts of Bag End. ‘I shall have to go. But’ – and here he looked hard at Sam – ‘if you really care about me, you will keep that dead secret. See? If you don’t, if you even breathe a word of what you’ve heard here, then I hope Gandalf will turn you into a spotted toad and fill the garden full of grass-snakes.’
Sam fell on his knees, trembling.
– The Lord of the Rings, Volume One: The Fellowship of the Ring, Book One: The Ring Sets Out, Chapter 3 Three is Company
D’awww indeed. If Sam knew about these guys, I bet his reaction would be far different.