Birds have loud voices

The green space at the back of the house is home to some birds.
One type is a cardinal I'm told, the others are sparrows and starlings and maybe some other non-exotic varieties.
Now that the decent weather has arrived and the house windows are open all night, the birds have a captive audience for their morning sing songs, Me!
It gets light about 4.30 am and the little bastards wake me up with their incessant chirping and territory marking throat noises.
Getting up so early in a morning does have its advantages though, appealing light!.
Thank you birds.

Ah well. Until 4.30am tomorrow....