Dear Rhett, I think that the bird doing the repeated note is likely an American Robin. A Song Sparrow is also heard on the clip. Sincerely, Tim Janzen From: obol-bounce@xxxxxxxxxxxxx [mailto:obol-bounce@xxxxxxxxxxxxx] On Behalf Of Rhett Wilkins Sent: Tuesday, May 14, 2013 8:36 PM To: obol@xxxxxxxxxxxxx Subject: [obol] Bushtit Nest Video & Mystery Bird Sound Scott Carpenter and I enjoyed filming and photographing an active Bushtit nest in SE Portland today. Here is a link to a very short clip of an adult female delivering food. CHALLENGE: Can you identify the bird in the background producing a single, whimpering, squeal-like note repeatedly? http://www.flickr.com/photos/boundtobird/8739394291/in/photostream Good birding! Rhett Wilkins