Kissena Park here in New York City is well known among birders and avian photographers for the wide variety of birds found in the park. One of the reasons is the is the various food sources and hiding places in the forested areas.
Your Pokeweed looks about as popular with the birds as our American Beauty Berry is down here Morris. Like a lot of things that affect us and not "them", I think Pokeweed is toxic to humans, but the birds don't seem to have an issue with it.