Leaf-cutter bee carries piece of leaf to build nest cell (image) Utah State University Share Print E-Mail Caption A leaf-cutter bee carries a piece of a leaf it's cut to build a nest cell for its offspring. Utah State University scientist Joseph Wilson says the bees may be using plastic waste in place of natural materials. Credit Joseph Wilson Usage Restrictions Credit author 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.