The second clip that Cameron uploaded to YouTube is to my ear the typical "chimp" note of a Pacific Wren. They often give it in pairs, as was the case during the recording. An example of a typical Pacific Wren call can he heard here: http://www.xeno-canto.org/162163 The typical call of a Winter Wren 9s a sharper "kep" also given in pairs, such as here. http://www.xeno-canto.org/62503 The twittering or agitated calls of both species sound very similar to me and I don't think they are useful in separating these sister taxa. Mark Mark Lockwood Alpine, Texas 79830 Edit your Freelists account settings for TEXBIRDS at //www.freelists.org/list/texbirds Reposting of traffic from TEXBIRDS is prohibited without seeking permission from the List Owner