Very quick walk through Central Park this morning produced some nice birds.  The highlights were:  BAY-BREASTED WARBLER (Riviera, 8:35AM) and BLACKBURNIAN WARBLER (E. side of Mall,  9AM, seen singing from the path closest to East Drive.)  Others included:  Northern Parula  Yellow Warbler (Lake side, near Boathouse.) Chestnut-sided Warbler (near Oven.) Magnolia Warbler  Black-throated Blue Warbler Yellow-rumped Warbler Black-throated Green Warbler Black-and-white Warbler American Redstart Ovenbird Northern Waterthrush  Common Yellowthroat Wilson's Warbler (Point, seen from Oven.) Canada Warbler (near Bow Bridge, Ramble side.) 
PS  Between 7 and 9 this morning a small group of us strolling through the Ramble with Steve Quinn saw every one of Junko's warblers EXCEPT the Blackburnian.  As a bonus we also saw the Blue-gray Gnatcatcher nest , with both of the tiny birds fluttering around it. It is fairly high in an American Sycamore [the only one there!] just north and west of the Bow Bridge. Here's the description of the gnatcatcher nest from The Birder's Handbook:
"Nest: cup-shaped, saddled on horizontal limb or fork; compact, of plant down and similar materials held together with bits of lichen, lined with fine materials. "
Amazingly, that's exactly what the nest looked like. Soft, soft, soft. While we were searching for it a birder on a walk with the NYC Audubon passed by and said that the gnatcatcher nest is the size of a walnut. Well, it wasn't. It was considerably bigger.