The New York Crane is not a rare bird. It can be see everywhere in the city, especially in Downtown Manhattan. 
As awkward and innocuous as they may appear, they have a tendency to collapse.
91st Street – May 2008
34th Street – April 2012
57th Street -October 2012
Long Island City – January 2013
It is nerving to see Downtown Manhattan resemble a nesting ground for these cranes.
Nassau and Anne Streets
John and Nassau Streets
World Trade Center Site
No matter how well these things might be functioning, I must admit to half-expecting one of them to “fall like a dinosaur” at any moment. I look forward to the day when they find another place to roost.