I don't know what kind of berries these are, maybe Hawthorn. If they are then they are edible, full of nutrients,vitamins and minerals according to well known NYC wild foods expert Wildman Steve Brill. He also says they have medicinal properties and can be infested with insects. But I don't know if they are Hawthorn berries and in truth, besides my general lack of knowledge of berries, I also have a learned or conditioned response to these tantalizing, colorful things as - poisonous. Clearly these are not as I see birds eating them.
I wouldn't normally dwell on the subject but as the topic of urban foraging and the information about it increases, it's an interesting notion to think about the abundant availability of food and medicine, free- Central Park is full of them. In scarce times, not to mention it's relevance to local, carbon footprint issues etc it's a fascinating and timely subject. It would be fantastic if you could take a picture and something like Google's Goggles or some other app could tell you what it was, was it edible and whether it was ready to eat. In the meantime, I'm hunting and gathering as many foraging blogs and twitterers that I can to learn more.
+ OGMedia:Berries in the Fall
+ GreenKraft:Fallen Leaf Plates