I’m reasonably confident these are white storks, and I believe their presence on the platform also answers questions my cousin Maria (hi, Maria!) asked about similar platforms which appeared in photographs from other posts late last year. I can’t state with certainty that all such platforms are intended for or solely used by storks, but I expect they’re intended for and used more by storks than any other type of bird. You and I wondered if it was maybe ospreys, and I’m afraid I’ve not yet gotten a book that’ll tell me which birds ply the forests and waterways of this corner of Europe so I’m not even sure if ospreys are found here – haven’t seen any myself, yet, but I’ve not really been looking yet. I am confident storks do, and this is the first pair I’ve seen. They really do clack their bills and communicate with each other a lot! If the left-hand photo below, you can sort of make out this platform in the middle near the top of the photo.
(so much world, so little time....) 
Pretty sure you’re right, Paul. They’re storks. And storks bring good luck, I do believe.
March 27, 2022 at 14:26
Great photo! Thanks for the comments.
March 27, 2022 at 17:45