Where can I find Snek and Zaba in order to unlock their achievements?

I can't find those two creatures:

I want to get their achievements. Where can I find them?

Using the image below as a reference:

They can be found in Chapter 5, inside the house marked as 4:

For Snek:

blow random hornes while you get a snail head. Than blow the bottom horn while you get the complete creature.

For Zaba:

blow random hornes while you get a frog head. Than blow once the bottom horn and once the top horn.

Source: jayisgames.com Walkthrough

For more detailed information on this particular location, see the following question:

What is the pattern to the stomach room with the horns?

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