To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie S1 Dorsal branch migration and fusion in a control btl>GFP-moe embryo; 10 confocal sections (1-μm intervals) were taken every 59 sec for 1 hour. Scale bar: 10 μm. Imaging conditions are the same for all movies unless otherwise stated. Escargot controls the sequential specification of two tracheal tip cell types by suppressing FGF signaling in Drosophila Guangxia Miao, and Shigeo Hayashi Development 2016. 143:4261-4271; doi: 10.1242/dev.133322 Download Original Video