My brother thinks this might be a Laughing Kookaburra. I am inclined to agree.
You can hear the sound of this bird here:
This bird is part of the Kingfisher family and is native to Australia. How did it get in my back yard area?? It could have escaped from a zoo or maybe a trainer? If it did, it was recently, as this sound was just heard in the last 3 weeks or so.
I still have not been able to see the bird. It seems to be very high in the tallest of palms. Its only been heard early in the morning or late in the afternoon around 4:00-5:00pm.
I feel sorry for it. It's alone with no mate, and they mate for life. :(
Apparently, they are not afraid of humans. I am going to try to lure it here this weekend.