Hi David,

This may be a purely personal thing, but sometimes the first Red-eyed
Vireo of the year sounds to me like an Acadian Flycatcher.  They don't
later on in the season so I don't know why.  Oh, I just remembered that
I caught someone else doing the same thing, so it is not just me!

Good Birding,
Patty Craig
Dameron, St. Mary's County, MD