Argonne National Laboratory has released a new version of the RESRAD-BIOTA code. RESRAD-BIOTA evaluates radiological doses to animals and plants. This new version (V.1.5) has probabilistic analysis capability that allows users to conduct uncertainty analysis on most input parameters. All RESRAD Family of Codes can be downloaded from the RESRAD Web site (http://www.evs.anl.gov/resrad). This new version has been tested successfully on Windows Vista, Windows XP, and Windows 7 operating systems and 64-bit computers. For questions and comments on RESRAD codes, please send email to firstname.lastname@example.org.