Don't count your owls before they are delivered.
Don't, Ginny, we'll send you loads of owls. We'll send you a Hogwarts toilet seat. George! Only joking, Mum.
The owl goes not into the nest of the lark.
As Hegel put it, only when it is dark does the owl of Minerva begin its flight. Only in extinction is the collector comprehend.
A wise old owl once lived in a wood, the more he heard the less he said, the less he said the more he heard, let's emulate that wise old bird.
Beware The Court of Owls, that watches all the time, ruling Gotham from a shadowed perch, behind granite and lime. They watch you at your hearth, they watch you in your bed speak not a whispered word of them or they'll send the Talon for your head.
An owl is the wisest of all birds because the more it sees the the less it talks.
More like some small, fierce bird of prey, something with a sharp bite. An owl perhaps, that speaks only when the rest of the world sleeps. Jenny will do well enough.