“The Crocodile” by Lewis Carroll (1832-1898):

How doth the little crocodile  
   Improve his shining tail,
And pour the waters of the Nile  
  On every shining scale!

How cheerfully he seems to grin,  
   How neatly spreads his claws,
And welcomes little fishes in   
   With gently smiling jaws!

(Photo by Flickr user Tambako the Jaguar)