" Music was coming from somewhere. Riddle whirled around to stare down the empty Chamber. The music was growing louder. It was eerie, spine-tingling, unearthly; it lifted the hair on Harry's scalp and made his heart feel as though it was swelling to twice its normal size. Then, as the music reached such a pitch that Harry felt it vibrating inside his own ribs, flames erupted at the top of the nearest pillar.
A crimson bird the size of a swan had appeared, piping its weird music to the vaulted ceiling. It had a glittering golden tail as long as a peacock's and gleaming golden talons, which were gripping a ragged bundle.
A second later, the bird was flying straight at Harry. It dropped the ragged thing it was carrying at his feet, then landed heavily on his shoulder. As it folded its great wings, Harry looked up and saw it had a long, sharp golden beak and a black beady eye.
The bird stopped singing. It sat still and warm next to Harry's cheek, gazing steadily at Riddle.
"That's a phoenix...." said Riddle, staring shrewdly back at it.
"Fawkes?" Harry breathed, and he felt the bird's golden claws squeeze his shoulder gently. "

― J.K. Rowling , Harry Potter and the Chamber of Secrets (Harry Potter, #2)