Supplemental Movie EV1. Wing vessel formation constrains the environment for immune cell migration in vivo. Hemocytes (cytoplasm, magenta; nucleus, yellow) migrating within the pupal wings at 18h, 40h and 75h APF. The images were acquired every 2 min; scalebar is 100 m. Genotype was Srp>nRFP; Crq>GFP. 

