There are several books and CDs which can help you learn to distinguish which types of birds are singing which songs. Without googling - is Kroodsma the big name? And the Cornell lab?
Even if you just learn the 5-10 most common birds around you - for me it is probably robin, cardinal, mourning dove, goldfinch, housefinch, chipping sparrow, bluejay, and a few more - just makes your every day experience richer. Just a really low cost way to learn more about the things you see and hear around you every day.
Around us, there are SO MANY robins, and they sing SO LOUDLY first thing in the a.m. and last thing at night.
We have a woodpecker who occasionally likes to announce his ownership of the surrounding territory by hammering on the gutters at dawn. This I can do without. Otherwise, birds are cool.
I love the dawn chorus when I’m camping or on vacation, but I hate the robins and California towhees at home when they start warbling and cheeping at 4:30 in the morning.
You were only waiting for this moment to arise.
I’ve not actually been to Guam myself, but the bird shortage is about the worst thing I’ve ever heard about the place.
Say, do brown tree snakes eat little children?
We noticed a new birdsong the past few mornings. Today I’ve seen male and female rose-breasted grosbeaks at our feeders! I checked out their song, and that’s what it is!
Haven’t had them visiting us for years. 
I love birdsong too. In fact, mockingbird is my favorite. I especially love to hear a juvenile who is just starting to expand his repertoire.
Strange thing, last year I would swear I heard some cardinals – here, in California.
P.S.: ** kayaker: ** Thanks for the link to that birdsong site. It’s a good resource.
I’ve never seen one in my yard, but this spring found a dead one outside our picture window of death. Only other victim this spring was a yellow warbler. The house sparrows and robins just seem to bounce off! :rolleyes:
Last couple of days I’ve been seeing a redstart flitting around the back corner of my yard. Saw it/them last spring as well. Glad to see them, as they seem to move through pretty quickly.
I’m glad I’m not the only dissenter. I can’t concentrate with all that chirping. You’re lucky that they don’t start in until 4:30. Around me, they frequently start at 3 or so. Maybe I can release some tree snakes in the area…