Grzegorz Buczkowski, Purdue University (IMAGE) Purdue University Caption Grzegorz Buczkowski said odorous house ants, native to the mainland United States, have invaded Hawaii and are forming large colonies. Credit Purdue Agricultural Communication file photo/Tom Campbell Usage Restrictions None License Licensed 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.