139 Sudbury & 121 Brandon - The Unseen

Mention to most people that you spent the day birding, and they will ask 'What birds did you see?"  When you go birding along VT73 thru the Brandon Swamp, and the birding is not about what you see but what you hear.  Herons, rails, wrens, owls... all heard but unseen.  Today I came away with 4 recordings of birds I could not see and did not recognize immediately -- Two of those recordings were of birds that were probably within 12 feet of the road edge.  I'll need to compare my recordings to Peterson's guide to Bird Songs and to my iBird Pro recordings, to see if I can make concrete identifications. 

Initial Checklist for Sudbury:
Mallard
Virginia Rail (both male and female calls)
Marsh Wren
Belted Kingfisher
Willow Flycatcher
Warbling Vireo
White-breasted Nuthatch
American Robin
Mourning Dove
Gray Catbird
Common Yellowthroat
Yellow Warbler
Yellow-rumped Warbler
Red-winged Blackbird
Common Grackle
Swamp Sparrow
American Goldfinch
Unknown #1
Unknown #2
Unknown #3
Unknown #4