Being a landluber, I'll have to pass on the gulls, but I believe the hawk is indeed Red-tailed. The sides of the light belly band are visible, as is the dark patagial bar on the leading edge of the wing.
Yes Astrobirder, continuing - and all the "big birders" near Allentown have taken a look. No one is quite sure of it's provenance though. Apparently some people buy and keep this species in their ponds for show. Though no one seems to know of anyone locally doing this.