To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 2 Example movie of Gray-Scott model with the center mutant patch (same parameters than in Fig 4G). Activation of butterfly eyespots by Distal-less is consistent with a reaction-diffusion process Heidi Connahs, Sham Tlili, Jelle van Creij, Tricia Y. J. Loo, Tirtha Das Banerjee, Timothy E. Saunders, and Antónia Monteiro Development 2019. 146:None-None; doi: 10.1242/dev.169367 Download Original Video