Dear list members, We are pleased to announce the following article on North Atlantic right whale acoustics and vocal behavior: _Vocalization characteristics of North Atlantic right whale surface active groups in the calving habitat, southeastern United States_ (http://scitation.aip.org/content/asa/journal/jasa/134/6/10.1121/1.4824682) (2013) _Trygonis_ (http://scitation.aip.org/search?value1=Vasilis+Trygonis&option1=author&noRed...) , V., Gerstein, E., Moir, J., and _McCulloch_ (http://scitation.aip.org/search?value1=Stephen+McCulloch&option1=author&noRe... ) , S. Journal of the Acoustical Society of America 134, (6) 4518 Abstract: Passive acoustic surveys were conducted to assess the vocal behavior of North Atlantic right whales (Eubalaena glacialis) in the designated critical calving habitat along the shallow coastal waters of southeastern United States. Underwater vocalizations were recorded using autonomous buoys deployed in close proximity to surface active groups (SAGs). Nine main vocalization types were identified with manual inspection of spectrograms and standard acoustic descriptors were extracted. Classification trees were used to examine the distinguishing characteristics of calls and quantify their variability within the SAG vocal repertoire. The results show that descriptors of frequency bandwidth and spectral disorder are the most important parameters for partitioning the SAG repertoire contrary to duration-related measures. The reported source levels and vocalization statistics provide sound production data vital to inform regional passive acoustic monitoring and conservation for this endangered species. The full text is available online at: http://dx.doi.org/10.1121/1.4824682 Regards, Edmund R. Gerstein, Ph.D., Director Marine Mammal Research Charles E. Schmidt College of Science Behavioral Sciences Building Florida Atlantic University 777 Glades Road Boca Raton, Florida 33431 561-338-9185 direct, 561-809-9185 cell _egerste1@fau.edu_ (http://egerste1@aol.com/) , _gerstein2@aol.com_ (http://gerstein2@aol.com/)