West Sussex There’s another sound – a continuous metallic whirr, like a fishing reel spinning
The slow-moving river surface reflects the blue sky and the patches of white and gunmetal-coloured clouds passing overhead. The trees and long, damp grass rustle in the breeze.
Familiar summer-morning bird song rises from the trees, reeds and bushes – song thrush, wren, reed bunting and the rhythmic, steady, repeated “chit-chit-chit” of a reed warbler. A nearby sedge warbler competes, blaring out its more hurried, chaotic whirrs, chatters and whistles from the top of a small tree.
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Source: Guardian Environment