need help for ernie's song

[xji]

I　watch the sesame street with my baby almost every morning. on last Thrusday, when I found one song the Ernie sang is very interesting, but I missed most of it. I just remember only Ernie sang a song under an apple tree, about lonely, with a bird? not anything else.

Do you know this song's title, or where can I find it.

I lived in CA,US

Thanks

JJ