Yesterday and today we found one Elephant Hawk Moth Caterpillar (Deilephila elpenor) in the middle of our garden pond. First I was wondering how they could get there but then I read that the adult moths usually lay there eggs under then leaves of Buck Bean (Menyanthes trifoliata) which is a waterplant.
This one is very young what is prooved by the green color.
This one is older and will pupate soon. If it doesn't hatch out this year it overwinter in the box I made for it.