This delightful little butterfly is best-known for having two different looking forms, levana and prorsa that represent the spring and summer broods respectively.
The first two photos show the spring form levana; individuals are primarily orange in colour, giving them the appearance of a small fritillary.
The last three photos show the summer form prorsa; individuals are blackish with white markings and look more like a very small White Admiral (Limenitis camilla).
Top: Naardermeer, The Netherlands, 26 April 2014
Left: Naardermeer, The Netherlands, 2 May 2015
Middle: 's Graveland, The Netherlands, 11 July 2011
Right & Last: Staverden, The Netherlands, 26 July 2016