Nice spot !!
I find it interesting to see how the yellow color develops from a dorsal broadband to finish with two longitudinal stripes interrupted. That goes for terrestris, then for other sub-species, development (migration of xanthophores) is different. With fastuosa for example or some terrestris from Harz (north Germany), individuals become more yellow with age and the black color can disappear, leaving only traces of longitudinal stripes and on the snout.