Seeing a Northern Saw-whet Owl in Central Park is a real treat.  Only a few are seen during migration and they only seem to be one day guests of the park, so actually seeing one takes patience. 

Today, the Central Park birding community helped me out.  Rebekah Creshkof found the owl, told a friend who got me to the general area of the bird, and then another pair of birders helped me find the right tree.