You mentioned herons landing in the trees. On Quadra Island near my Mom's there was a grove where 7-12 great blue herons came in to land every night. An amazing sight with the massive wings slowing the great birds down gradually as they reached their chosen tree. Then they would reach out with those long legs to grasp the very tip top of the tree and when their body caught up to the feet they simply - stopped. It seemed to defy gravity that such a big bird did not make the treetop bend like Charlie Brown's Christmas tree. Yet land they did with not a wobble.