To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie S1. Failure of a natural mud nest attached to a glass plate. Avian mud nest architecture by self-secreted saliva Yeonsu Jung, Sohyun Jung, Sang-im Lee, Wonjung Kim, and Ho-Young Kim PNAS. 2021. 118:None-None DOI: 10.1073/pnas.2018509118 Download Original Video Browse All Videos »