“The first time Calypso came to check on [Leo], it was to complain about the noise.
“Smoke and fire,” she said. “Clanging on metal all day long. You’re scaring away the birds!”
“Oh, no, not the birds!”

“The only thing they had in common was Calypso, and every time Leo thought about that he wanted to punch Percy in the face.”

“Gaea?” Leo shook his head. “Isn’t that Mother Nature? She’s supposed to have, like, flowers in her hair and birds singing around her and dear and rabbits doing her laundry.”
“Leo, that’s Snow White,” Piper said.”

“Oh, the little birds sang east, and the little birds sang west.”

“Come, fill the Cup, and in the fire of Spring
Your Winter-garment of Repentance fling:
The Bird of Time has but a little way
To flutter — and the Bird is on the Wing.”

“Be a bird perched on a frail branch that she feels bending beneath her, still she sings away all the same, knowing she has wings.”

“She laughed enough to migrate an entire flock of birds. That was how she said yes”

“It was like a bird of rarest-spun heaven metal or like silvery wine flowing in a spaceship, gravity all nonsense now.”

“Sweet bird, that shunn'st the noise of folly,
Most musical, most melancholy!”

“The bird
That glads the night had cheer'd the listening groves with sweet complainings.”