I hadn't seen a Willow Warbler in Switzerland this year, and having a bit of spare time before going into work this morning, I figured I could spend some time around the Kaferberg looking for one. I used my bins and Merlin; and must have seen 50+ Chiffchaffs before seeing a bird that looked slightly different, especially more white at the breast.... It moved around a fair bit before singing: got a Wood Warbler according to Merlin (and features are consistent with that).
Definitely a new species for the year, but still no Willow Warbler
----
Also got very nice views of a Cuckoo and a Little Grebe at the Katzensee/Bussisee this afternoon. Happy day