Bison (IMAGE) Texas A&M AgriLife Communications Caption Blood-feeding flies and other parasites are a major hurdle for bison not adapted to the southern U.S. Parasite infestations can impact body condition scores, introduce diseases and stress animals. Credit (Texas A&M AgriLife photo by Sam Craft) Usage Restrictions reprint with appropriate attributions License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.