This is both a verb and a noun and means either to utter the short sharp sound of a bird or just a short sharp sound of a bird itself; in Polish we would say 'ćwierkać, świergotać, zaćwierkać, ćwierkanie'.
A few examples from the Internet:
- A NASA twin spacecraft has captured the clearest sounds yet from Earth's radiation belts- these sounds mimic the chirping of birds.
- There are quiet lawns to relax upon, listening only to the chirping of the birds and the humming of bees...
- Mrs. Page and I wake to the chirping of the birds daily.
- The chirping of small birds, the sound made by the swift course of a flight of small...
My question to you:
Do you miss birds' chirping? Do you ever notice birds' chirping? Do you like the sound of chirping birds?