Easter clue 4

I mirror the moon but hold no light,
I whisper to reeds in the hush of night.
I cradle the stars, yet I keep them afar,
And swallow the sky without leaving a scar.

I’m sought by frogs, by herons eyed,
By secrets that ripple and creatures that hide.
I’m not in the sky, nor deep underground —
But still, if you’re clever, I might be found.

Where am I?