Some species of butterflies and moths have caterpillars that change heavily in colors and pattern. Sometimes certain color forms are strictly existing (e.g. the caterpillars of the Death’s head hawk-moth, Acherontia atropos, can be green, yellow or black and white). Some species have simply “unique” caterpillars. The Red admiral’s (Vanessa atalanta) caterpillars belong to the latter.
The other day I found a good spot with masses of caterpillars of the Red admiral. I took the chance to get a better look at the diversity.