Hi Mike,
I expected you to get lots of responses from Finger Lakes birders
but just realized you sent this to the Maine birds list! (I live in
Seneca County NY so I am on the local bird list, but also on the
Maine list b/c in my dreams I get to live in Maine - plus we visit
whenever we can.) When I listened to your tape I immediately heard
Baltimore Oriole, even though I hadn't read the next line where you
said what Merlin's guesses were. It doesn't seem like an odd song,
except that at this point the orioles are all paired up and are
nesting here (about 15 miles south of Waterloo) so they aren't
singing so regularly. But three weeks ago there still was a fair
amount of oriole song here and it could be that this bird arrived
late or was unlucky getting a mate and is still trying.
Baltimore Oriole song can have very local dialects from what I hear
here. One year we had a male with a very distinctive song, both
rhythm and melody, and for a 6 or 8 years after that we could here
snatches of that song in those of younger males at our house, but
I've never heard anything like it in other orioles, not even the
ones just a mile or two up the road! (As you probably noticed when
you visited, this part of the Finger Lakes is very popular with
orioles, we always have multiple nests on our little 2½ acre plot as
do all our neighbors.) This year, 20 years later, I was startled to
hear a song that again echoed part of his distinctive song so bits
of it still linger on here but I still haven't heard it elsewhere.
Maybe your birds have a different accent from the ones here? I've
never been to Maine in April/May, we go in the fall, so have not
hear the orioles singing there.
And I don't know if Warbling Vireos have local accents but have
never heard one sing anything like this song, the tone is possible
but the rhythm seems off and it lacks the upward tendency in pitch
toward the end, which seems uniform here.
Hope you had a successful trip to Montezuma and are having fun
birding in Maine, the state of my dreams!
Best -
Alicia