I was just watching an episode of NOVA on PBS the other night that was about E.O. Wilson and he was being interviewed down in the Dominican Republic. In the background I could here last week's quiz bird saying "here I am - where are you - here I am" - one of the mnemonics for the Red-eyed Vireo (they must have shot that scene in the winter). This week we're out of the forest and on the water for our mystery bird.
Good luck and great birding!
Must be a Clark's grebe!