Greetings

I visited Swan Harbor in Harford County on Saturday, May 1. I was there from about 0730 until 1030 or so. I made one circum-traverse around the impoundment with a side line out to the rear impoundment; below are the results (I am excluding the common species -in all I had 63 species in three hours). 
 
In the forest on the drive in:
 
Eastern Kingbird (1)
Red-eyed Vireo (1)
Blue-gray Gnatcatcher (10)
Wood Thrush (10 or more -very vocal)
Pileated Woodpecker (1)
 
Impoundments/Fields:
 
Pied-billed Grebe (2 heard -one near the photo blind / one in the NW corner)
American Bittern (1 seen 0 heard)
Least Bittern (1 seen)
Great Blue Heron (3)
Great Egret (1 flyover)
Glossy Ibis (1)
Osprey (1)
Bald Eagle (3)
Mallard (4)
Wood Duck (12+)
American Coot (2)
Sora (1 seen and heard)
Ring-billed Gull (5)
Caspian Tern (1) 
Least Sandpiper (10)
Semipalmated Sandpiper (2 -with the leasts good comparison of size, color, giss, etc.)
Lesser Yellowlegs (19)
Greater Yellowlegs (4)
Solitary Sandpiper (8)
Pectoral Sandpiper (3) 
Wilson's Snipe (15+ flushed every 50 feet or so around the pond's edge)
Tree Swallow (many many)
Northern Rough-winged Swallow (20+)
Barn Swallow (20+)
BANK SWALLOW (5 in group flyover)
Purple Martin (many many near the houses)
Eastern Phoebe (1)
Red-eyed Vireo (2)
Northern Mockingbird (1)
Gray Catbird (1)
Brown Thrasher (1)
Northern Parula (1)
Common Yellowthroat (5)
Eastern Towhee (3)
Song Sparrow (2)
Swamp Sparrow (1)
Field Sparrow (1 heard)
Savannah Sparrow (5-10)
Chipping Sparrow (1)
Baltimore Oriole (1)
 


Good birding,
Chris Starling 
North East, MD