This morning at 8:00 I was wakened, delightfully, by the repeated proclamation of "pretty" being broadcast outside my bedroom window. It sounded like this:

"purDEE purDEE purDEE purDEE purDEE purDEE purDEE!"

The cries were in groups of seven, and repeated for 20-30 minutes. Can anyone help me identify the species of bird that sings this song?

Blessings,
Dave