Isle Royale Wolves (image) Michigan Technological University Share Print E-Mail Caption Gray wolves, like this pair on Isle Royale, are listed as endangered in the United States. Credit Michigan Technological University Usage Restrictions Please use photo credit. Share Print E-Mail 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.