Listen to Britain’s dawn chorus of 1976: the dramatic loss of birdsong in 50 years. Great audio reconstruction.
Same here near Utrecht, the Netherlands: From deafening chorus to almost silent spring, in the 30 years that we've lived in the same place: 1996-2026
https://www.theguardian.com/environment/2026/jul/03/dawn-chorus-uk-birdsong-50-years-audio-landscape