Grey Heron Chick(s) Hatched In Their Low, Low Nest!?

People at Hattori Ryokuchi Koen are saying that Grey Heron chicks have hatched in the nest made in low-hanging tree branches and a tree stump sticking out from the the surface of Shingu Ike lake. I can't see into the nest, but I can see that the parents are no longer sitting on the nest, but rather standing in or beside it....