I learned about it from an acquaintance: There is a nature reserve (NSG) in the Leine Valley. It is called Leinpolder. There are supposed to be sea eagles there as well. I was immediately hooked. I noted the name and planned to Google the address after the conversation. Through the continuing education program for nature scouts, I found the area:
Just the crown was missing otherwise we would have met the incarnation: the Frog King of the Lammer Holz! The stupidest thing: I did not even try to find out whether it is a enchanted prince! What a wasted opportunity! Well, at least I have my Braunschweig horse whisperer with me, who saves us just a couple of minutes later