Wondering about that bird outside

Dave and Jack have both been quite intrigued recently with the bird that has taken up residence in front of their home. The bird keeps saying, "Poo-tee-weet?" to the cats. They aren't quite sure what the bird is trying to say, but sometimes Dave responds with a quick, "mrauuw." And sometimes Jack responds, in a much higher tone, with a longer "maaaaaeeehhh---," trailing off at the end.

CSI: Dave, Volume XVIII

Today, Dave had a partner in his investigations of the bird outside. Action Jackson decided to join Dave. He was also perplexed by the bird, which again said to the cats, "Poo-tee-weet?"

CSI: Dave, Volume XVII

Today, Dave spent a good deal of time peering out the window, probably at a bird saying "Poo-tee-weet?"