For Peter - hope you find this.

Swift

The swifts winnow the air.
It is pleasant at the end of the day
To watch them. I have shut the mind
On fools. The 'phone's frenzy
Is over. There is only the swifts'
Restlessness in the sky
And their shrill squealing.
Sometimes they glide,
Or rip the silk of the wind
In passing. Unseen ribbons
Are trailing upon the air.
There is no solving the problem
They pose, that had millions of years
Behind it, when the first thinker
Looked at them.
Sometimes they meet
In the high air; what is engendered
At contact? I am learning to bring
Only my wonder to the contemplation
Of the geometry of the dark wings.

R.S. Thomas