New York City has lots of smaller parks.  The smallest are called Pocket Parks and are small areas next to large buildings which got a zoning variance in exchange for the park.  At any time in the year, these parks can contain an unusual bird or two.  They often have lingering birds staying over the winter.  They’re always worth checking, if you are by one.  Today, I got to see a pair of Brown Thrashers in a pocket park just east of Sixth Avenue between 46th and 47th.