A whale of a murmuration with a raptor on its tail

The Starlings are gathering at the Lago di Alviano and they’re swirling overhead. One moment they’re a tight, dark ball, the next they’re spread wide and thin across the darkening sky:

I can see a larger bird near them. Here, it’s on their right and above:

I wonder if it’s a Sparrowhawk or a Peregrine or some other raptor.

As the Starlings form a murmuration the size and shape of a whale, I can see it on their tail:

Imagine being faced with just so many dinners, all at once.