Thanks for your reply and looking forward to your tests!
In the meantime I bought a 2ndhand ls-11 on fleabay. Besides the raving reviews everywhere, I saw on yt a comparison between that, ls-14 and tascam dr-40 in which the ls-11 sounded remarkably well (bird chirp on the background verrry clear). Besides that I read Olympus has gone down the bells-and-whistles road with almost too much options for a simple recording person like me. And the added 3rd mic to enhance low sounds seems unnecessary to me for bird sounds (besides a bitter maybe).
Now deciding between a windjammer from Rycote or Gutmann.