I took a late lunch hour at the Little Patuxent Oxbow Lake Nature Preserve to look for snipe and cranes (no luck on both accounts). To my surprise, there were 80 Tundra Swan eating and resting to continue on their way north.

Also seen:

Red-shouldered Hawk
Belted Kingfisher
Yellow-rumped Warbler
Downy Woodpecker
Red-bellied Woodpecker
Northern Cardinal
Blue Jay
Fish Crow
Ring-billed Gull
Mallard