Many people were staring at her and a few were openly laughing and pointing; she had managed to procure a hat shaped like a life-size lion's head, which was perched precariously on her head.
The caveman who always assumed there was a lion behind the next rock would usually be wrong, but he'd be much more likely to survive and reproduce than one who always assumed the opposite.
Harry saw the gold Gryffindor lion, emblazoned on scarlet; the black badger of Hufflepuff, set against yellow; and the bronze eagle of Ravenclaw, on blue.