Interesting, ain't it? I do that, too. Try out those ones in bold--should be new for you.
From the very end of April, through all of May up until yesterday:
Common Nightingale, Common House Martin, Common Redstart, Wood Warbler, Common Whitethroat, Eurasian Wryneck, European Stonechat*, Common Grasshopper Warbler, Whinchat, Common Cuckoo, Common Reed Warbler, Sedge Warbler, Common Snipe*, Common Swift, Great Reed Warbler, Thrush Nightingale, Red-backed Shrike, Western Yellow Wagtail, Corncrake, Eurasian Golden Oriole, Marsh Warbler, Black Tern, Little Tern, Sand Martin
*don't overwinter here
EDIT: Except I've discovered you have Black Tern in the US.
EDIT 2: And I forgot my almost untickable Tawny Pipit, which was the reason I waited for so long to post the list here.