nests (IMAGE) Penn State Caption The researchers were interested in how nests varied across the noise treatment and kept track of when nests were initiated and how many eggs were laid. These photos show how laying date and ultimate clutch size varied through the breeding season with panel A showing nests early in the season and panel B showing nests two to three weeks later during incubation. Credit Julian Avery, Penn State Usage Restrictions non commercial use only 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.