River Warbler at Dawn - Ham Wall, Somerset, UK by Tom Tookey published on 2021-06-14T18:11:34Z Ham Wall dawn chorus with river warbler - early June 2021 00:00-03:30 (3:46am) - River warbler with cuckoo, bittern, tawny owl, reed warblers and water rail. 03:30-04:42 (4:16am) - Later in the chorus a song thrush and other birds join. As I understand it this is the first known river warbler in Somerset and the first in the UK for 10 years.