I was on my way to visit CCNY uptown when I saw an email on my phone with a report of a grounded hawk in Washington Square Park. So, I switched subway trains and headed for the park. When I got there I found a hawk in a tree looking a bit stunned, but otherwise fine. It didn't look like either of the nesting adults, so I was confused. Then the resident male, Booby appeared on the Judson church cross and I could see the female on the Ustream camera feed, so I knew for sure this was an intruder.
Bobby hunted nearby, caught a small rodent and ate it, before going off to roost in a favorite spot. Only after Bobby had left did the intruder leave the park, flying down LaGuardia Place.