The Prompt was: Phoenix!hermonie getting swallowed whole by Smaug and Smaug then finding out the very horrible mistake he just made. As Hermoine Phoenix fire's her way out.

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This was a mistake, is Smaug's first thought after he swallowed the irritatingly cheerful bird.

In hindsight, no normal bird could set themselves on fire and sing about it. He couldn't help it though. It was noisy, bright and it sang. It sang about the pretty sunrise, the pretty elves and the fire of eternity. It didn't surprise him that he ate it, what surprised him was that he didn't set it on fire. (Which was moot, since the bird set itself on fire first!)

Smaug was impulsive, he knew that. His dam and his sire had tried to beat that bad habit out of him, but that didn't work so well, given that he knew most of his bad habits came from them in the first place.

This though, he regretted very much.

The bird was some sort of Valar-sent creature, the very flames hidden inside its feathers burning him as it went its way down his throat and stomach.

It hurt, which was a novel feeling all on its own if it didn't make him double over and gasp in agony. It hurt worst than that damned Black arrow. That one was a pinprick in comparison. This feeling felt like a cleansing.

Smaug roared, venting out his feelings, before collapsing on his hoard of treasure with a sound very much like a whine.

Regret, Smaug sighed. 'If I survive this,' he thought. 'I will mind my temper.'

Then he lost consciousness.

..

When Smaug opened his eyes next, it surprised him since he thought that he would never open his eyes again. The bird brought him such pain that he didn't think he would ever survive it.

Then, as he started getting his bearings back, a cheerful chirp brought back his headache with a vengeance.

There, sitting on his snout, was that bloody bird, looking pristine, untouched and singing.

He couldn't help it - he roared at it.

The bloody bird flew out of range before coming back, setting itself on his back and then -

"Are you preening me!" he roared out. "I am not a bird, or a hatchling. Do not preen me, you loathsome creature! I am not even your species!"

The bird gave him such a chiding look that left Smaug speechless. Mostly in indignation.

..

Like, lol.