Thursday morning was looking grim and grey, with cloud so low it looked like fog, and a constant fine drizzle. But, when word came through that there was a festival of singing warblers at Cardiff Bay wetlands, I had to go. And it was absolutely amazing – with at least 14 newly arrived Sedge warblers singing alongside the resident Reed and Cetti’s warblers, as well as the more usual Blackbirds, Green- and Goldfinches, and Reed buntings, I may have got wet but was filled with wonder at the surround sound bird song. The Sedge warblers were mostly skulking but this Reed warbler, which had probably arrived a few days earlier and already established his territory, was enthusiastically advertising his presence.