Fülöp Tihamér, a biologist at Milvus Group, together with a few nature-loving volunteers, is walking across the grassland. They move several meters apart from one another across the open field, occasionally meeting up to discuss what they have observed.

To an outsider, it might seem as though they are taking part in some kind of unusual meditative walk.

But what are they actually doing? And, more importantly, why are they doing it?

You can find out by watching the video below.