A-well-a birds, birds, birds, b-birds are my . . . data?

Ahhh, to the seasoned ornithologist—of which I definitely am one—the morning chorus of birdsong is as familiar as an old friend. There, can you hear that cooing? That must be a dove. And what about the high-pitched, chirpy noise?  Because of my very experienced ear, I can clearly tell, um, that… it is… probably a …