We spent about 3 hours hawk-watching from Anzalduas on my last day; seeing about everything except Hook-billed Kite which is what everyone wanted. I got lucky and had a distant soaring Hook-billed earlier in the trip.
We had at least 5 Gray Hawks here though. A pair perched in a tree on the east side of the Park, while another pair of adults and a young bird soared overhead. This adult had a full crop.