Another Babysitting Bird (IMAGE) Washington University in St. Louis Caption Superb starlings are also cooperative breeders but they live in semiarid areas with undependable rainfall, a climate that is thought to have pushed them toward greater cooperation as a way of coping with variability. Credit Dennis Irrgang Usage Restrictions Please credit 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.