Bird-Song Lyrics Game.

Here are some lyrics from four different songs which mention a bird somewhere in the song.
Name the song and the artist who sang it. (some have more than one). You can e-mail the answers: lvn600@hotmail.com or post them under comments.

1) "In the tree by the brook there's a songbird who sings"..............

2)"Birds singing in the Sycamore Tree"...........

3)"The chief bird standing at the birdbath stand---taught him how to do the bop and it was grand"..........

4)"If I leave here tomorrow would you still remember me?"