Fifth International Workshop on Detection, Classification, Localization, and Density Estimation Aug. 22-25, 2011 and associated seminars on Detection and Classification and Density Estimation Aug. 21, 2011 Mt. Hood Timberline Lodge Oregon, USA You are invited to attend the fifth workshop on Detection, Classification, Localization, and Density Estimation (DCLDE), which will be held next August 22-25. On Aug. 21, the day preceding the workshop, two seminars will be presented in parallel. One, on density estimation, will be led by Len Thomas, and the other, on detection, classification, and localization, by Dave Mellinger, Marie Roch, Eva-Marie Nosal, and Holger Klinck. Two datasets for the workshop have been prepared, one for detection and classification and one for localization. These are for training DCL algorithms. As in past years, a challenge dataset will be presented later with which attendees can test and compare algorithms. Information about the venue, the workshop, and the tutorials, as well as a link to the datasets, are available on the conference web site: http://www.bioacoustics.us/dcl.html Abstract submission guidelines will also be presented shortly, as will registration procedures. The workshop is sponsored by the Office of Naval Research (Michael Weise), the Navy's Environmental Readiness Division (Frank Stone), and the Acoustical Society of America.