Two versions, same species

Last Friday, I saw this butterfly. It wasn't immediately obvious what it was, I was hoping it was a white admiral, and it looked like one from a distance:

^{Olympus Stylus 1s, 300mm, ISO200, f7.1, 1/125s}

Its markings looked similar to those of the white admiral, but it turned out to be the summer form of a map (Araschnia levana), landkaartje in Dutch.

This species of butterfly has two annual broods that look very different. The spring edition looks like this:

^{Olympus Stylus 1s, 300mm, ISO200, f5.6, 1/160s}

These two versions look completely different, yet they are the same species. Strange but true.

Thanks for watching!