This Seeking Tech tutorial will show you how to get the Them’s Good Eatin’ trophy and achievement in the Master Collection version of Metal Gear Solid 3: Snake Eater.
To unlock this, you need to “collect every type of frog.”
All three required frog types can be found in Chyornyj Prud. You may need to use Thermal Googles to spot them easier.
Check out the video below to see the exact locations: