Fifteen birds in five fir-trees

Fifteen birds in five fir-trees is a song sung by the Goblins as they set fire to the trees that Bilbo, Gandalf and the Thirteen Dwarves are sheltering in, following their escape from the clutches of the Great Goblin.

Lyrics
 Fifteen birds in five fir-trees, their feathers were fanned in a fiery breeze! what funny little birds, they had no wings! Oh what shall we do with the funny little things? Roast 'em alive, or stew them in a pot; fry them, boil them and eat them hot?

Burn, burn tree and fern! Shrivel and scorch! A fizzling torch To light the night for our delight, Ya hey!

Bake and toast 'em, fry and roast ’em! till beards blaze, and eyes glaze; till hair smells and skins crack, fat melts, and bones black in cinders lie beneath the sky! So dwarves shall die, and light the night for our delight, Ya hey! Ya-harri-hey! Ya hoy!