The fledglings have discovered the wall that separates the park for Riverside Drive and the West Side. While sitting on it, the hawks have a good view of squirrels and rodents below the wall. While below it, they can look into cracks between the stones to find nesting rodents.
For the hawks, it’s natural. For the hawk watchers, who know the city and its danger are just on the other side of the wall, it seems unnatural. But it’s just part of the hawk’s growing up and learning more about their environment. Soon they’ll be perching on Riverside Drive buildings, just like their parents.