Narew

The troops’ task was to cross the Narew River near the town of Nowogrod, in a region about two hours’ drive from the borders of Russia’s exclave of Kaliningrad and of Russian ally Belarus.

Police spokesman Mariusz Ciarka said Monday that police are searching for Litynski’s body in the Narew River in the area around Pultusk, a town north of Warsaw.

It sits at the confluence of the Vistula and the Narew rivers, and is one of the longest buildings in Europe, with much of it abandoned and crumbling.

Those conservation programs might not normally prioritize a tiny population like the one in Narew National Park, but Nowicki and his coauthors argue they should.

“This is because the population is located within the Narew National Park, where passive preservation measures are strongly promoted and where the butterfly is not listed among the priority species for the park,” he says.