Avara luonto

On the trail of lake seals (31x2)

Data emisji: Sty 14, 2017

Only five lakes on Earth have a permanent seal population. Seal photographer Juha Taskinen and seal researcher Mervi Kunnasranta were the first to travel to the seals that had been sealed off by the land to find out how the seals had ended up in the lakes and what they were up to.