Ivy bees on thistle (IMAGE) University of Sussex Caption Ivy bees (Colletes hederae) visiting creeping thistle (Cirsium arvense) Credit Allan Burrows Usage Restrictions Please always credit photographer Allan Burrows and only use alongside this story. 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.