All varieties of bird song fill the air, from the monotone whistle of the Field Sparrow, to the wolf call of the Cardinal (and that's exactly what it sounds like) to the tea-kettle tea-kettle song of the Carolina Wren. After the mostly dead silence of winter, the world suddenly seems very much alive and very noisy indeed. And as the birds calm down for the night and go to sleep--except for the owl, of course (I heard one this morning when my eyes flew open at 4 a.m.)-- the spring peepers* wake up at the pond and they serenade all night long until dawn breaks. Shakespeare said it all:
In the spring time, the only pretty ring time
When birds do sing, hey ding a ding, ding;
Sweet lovers love the spring.
*We had one of these little guys as a pet for the winter one year. It came in the house in the late summer (we had about an 1-inch gap at the bottom of the screen door) and I found it in the bathtub. I took it outside and let it go and about an hour later it was back on the porch heading for the house again. So I brought it in and put it shower enclosure, which is made out of redwood and there are some holes in it where knots came out. So the frog stayed there all winter, pretty much sleeping but occasionally waking up and getting on the shower curtain or moving around other the tub. In the spring I put it outside and it went on its merry way