This morning I was down by the river and heard a grating noise that I’ve never heard before. I sat there for a while to try to get a glimpse of the birds making the noise. Eventually, one came out of the thick tree cover, it was Nightingales chattering to each other. I’ve heard their high pitched repetitive call and obviously the amazing song of the males, but never this chattering call. To me it sounds like a cross between a Frog and a muffled Crow.
I took a recording, you may have to turn up your volume to hear them in the background. You’ll have to listen through the noisy Zitting Cisticola flying around. You can also hear the Nightingale’s normal high-pitched call too.