Forager Honeybee (IMAGE) University of Würzburg Caption Nurse bees are -- contrary to forager bees -- active 24/7. Their circadian clock simply continues at the protein level. Credit Photo: Gunnar Bartsch 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.