The Brown Trout & the Mayfly

Hatching insects and jumping trout is the epitome of clean water and fresh nature. But how long can we keep this idyll? Anthropogenic pollution and alteration of rivers and streams threatens the spawn ... Pokračovat

Hatching insects and jumping trout is the epitome of clean water and fresh nature. But how long can we keep this idyll? Anthropogenic pollution and alteration of rivers and streams threatens the spawning grounds of fish and the life of insects.