Great Meadows NWR–Concord Unit, Middlesex, Massachusetts, US
May 23, 2021 6:27 AM – 9:50 AM
Protocol: Traveling
2.5 mile(s)
Checklist Comments:    70-80, sunny.
49 species
Canada Goose  8
Mute Swan  7    Not a good count of the young
Wood Duck  15    One family group of 8 with a second female that eventually took off
Mallard  2
Hooded Merganser  2
Mourning Dove  4
Yellow-billed Cuckoo  1    Singing presumably across river
Virginia Rail (Virginia)  5    1 at parking lot, 1 down to left, 3 calling to each other to right
Killdeer  1
Solitary Sandpiper  2    (Leader only?)
Double-crested Cormorant  1
Least Bittern  1
Great Blue Heron (Blue form)  6
Green Heron  1
Broad-winged Hawk  1
Red-tailed Hawk (borealis)  1
Red-bellied Woodpecker  2
Downy Woodpecker (Eastern)  1
Northern Flicker (Yellow-shafted)  2
Eastern Wood-Pewee  1
Willow Flycatcher  3
Great Crested Flycatcher  2
Eastern Kingbird  5
Yellow-throated Vireo  1
Warbling Vireo (Eastern)  4
Blue Jay  5
Tufted Titmouse  1
Tree Swallow  10
Barn Swallow (American)  6
White-breasted Nuthatch (Eastern)  1
Blue-gray Gnatcatcher (caerulea)  2
House Wren (Northern)  1
Marsh Wren (palustris Group)  4
Gray Catbird  2
Wood Thrush  1
American Robin  5</