Rats.

mantic

Living here for all my life by Brower Park over 40 years, I have never seen such a rat problem on the street. 

Since the renovation of the building on the corner of Kingston and Park they are very boldly everywhere on that corner.

These are a peculiar kind as they seem to have no fear of people. They can be seen a half dozen or more at a time. They appear to be breeding rapidly.

Cold weather is coming and they will migrate and move indoors. They haven't gotten down to my building at the other end yet, at the rate they are expanding their zone, they will be soon.

Who do I call about this? 

homeowner

Bad news, going through official channels may not get you any help.

http://abcnews.go.com/US/wireStory/rats-report-shows-pest-complaints-jumped-nyc-26140605

You're supposed to call 311 to report rat problems. In addition to that I'd reach out to the block association. Have all the neighbors on the block start a concerted calling effort so that 311 is getting a high volume of calls about the same location. That might result in getting a better response.

The block association should reach out to the owner of the property on Kingston and Park. They've just dumped a ton of money into that project and I'm sure they don't want to rent with rats in the basement. See if the neighbors can convince the owners to pony up for private rodent control outside of the building. By this point, the rats have probably made themselves at home in the park as well. Call the local Parks Department district office and track down the person that is responsible for Brower Park. See if the block association can convince the Parks Dept to also exterminate and put down bait. Also contact the Children's Museum and the school on Kingston. If all of those folks are trying to work on the problem, you might actually see something happen.

whynot_31

A friends has a rat terrier who is quite good at killing rats.

...I don't think he lends it out, however.

http://en.wikipedia.org/wiki/Rat_Terrier

Dawndew

look for the burrows they dig and bait them. If you break up the burrow they will scatter everywhere. Probably what happened at Kingston and Park. Best to know where they sleep and feed them "goodies" like Jaguar brand bait.