a flight of swallows

 This afternoon, I set off on a walk, and spotted a lone swallow swooping over the brook.
I walked along the Nene, the sky threatening rain. After a short shower, the sun came out and I saw a red kite, a pied wagtail, and a pair of reed warblers darting into their nest on the river bank. As I walked back down the High Street, just rounding the slight curve before our house, the sky filled with swallows, swooping and screeching.