If this helps any, the cuckoo calls are easy to imitate, and they (both species) usually respond either by calling back, or more often by flying in, silently; then calling. To imitate the Black-billed, use three rapid short hollow sounding whistled phrases, as though you were imitating the first note of the famous clock - three times in rapid succession. I.e., "Kuock, Kuock, Kuock". The Yellow-billed is roughly the same, but with only one note per phrase, a bit more hollow sounding, and slower. "Kuoockk...,...Kuoockk...,...Kuoockk..." The important thing to remember with this and any sound device, is to let the little guy win! He's responding to a perceived threat to his territory. I like to think that after he's driven off that threat, I'm giving him a chance to go back and ask: "So, how's that, Honey, Impressed?". And of course, she will answer: "My Hero!" And they lived happily ever after. (At least for that nesting season anyway). Richard Guthrie New Baltimore, NY [log in to unmask] -----Original Message----- From: Vermont Birds [mailto:[log in to unmask]]On Behalf Of Lawrence, Miriam Sent: Wednesday, June 08, 2005 9:14 AM To: [log in to unmask] Subject: Re: [VTBIRD] BB Cuckoo Heard the BB Cuckoo again last evening. I am definitely planning a "cuckoo location exercise" if I continue to hear it, but I'm not hopeful given what everyone seems to be saying! Indigo bunting has been singing here as well, and I caught a nice look at one two days ago. Miriam Lawrence Monkton