One bird that I seem to struggle with each year, is the Garden Warbler. and when I say struggle with, it's particularly the song. After so many months of not hearing one and having my ears fine tuned, this bird often sounds like a loud or excitable Blackcap. Add to that their secretive nature, and reluctance to sing nicely out in the open for all to see, it's been a bit of a bogey bird. Fortunately I now have a reliable spot for them just down the road, but it still takes my ears some getting used to distinguish between this and the Blackcap.
Not a very exciting looking bird, with no obvious colouration or detail. It more than makes up for that with it's song. Nice to have them back for another year.