This 2018 video from Germany is about large tortoiseshell butterflies.
The Dutch butterfly foundation reported on 6 June 2019 that large tortoiseshell butterflies are reproducing in the Netherlands.
This species had become extinct in the Netherlands. In 1996, a caterpillar was found for the last time. From 2011-2014 many adult butterflies were seen; but caterpillars only three times from 2000-2018.
This year, caterpillars were discovered at six different spots all over the Netherlands.
Scarce tortoiseshells, another species rare for the Netherlands, were also seen again this year.
Dear Kitty. Some blog 