It's been a funny old spring, bird-wise. The cold temperatures right into the first week of May, and the northerly winds that brought them, held up the arrival of many migrants, and even now, I've yet to hear a Cuckoo, have barely heard or seen any Willow Warblers, and missed Wheatear altogether (although that was more that I haven't been to any suitable habitat, really). Hirundines and Swifts have been sparse, although numbers are starting to grow now.
On the other hand, some species, such as Yellow Wagtail, appeared in large groups when they did arrive, and there have been decent passages of things like Black Tern (plus a couple of White-winged Black Terns). Up at Frampton Marsh RSPB last week, there were some good waders – lots of Dunlin and Avocets, a few Curlew Sandpipers and Little Stints, and Greenshanks.
Some of these things may be connected to longer term declines or increases, but others are part of what makes migration, and birdwatching, so endlessly fascinating. Things turn up where they shouldn't, or when they shouldn't, or both, and so you never know quite what you'll find when you leave the house.
It's something I touched on in my book A Sky Full Of Birds – you can buy it here, or if you'd prefer a signed copy I have paperbacks available. Just email me if you're interested.