Here is the full list of all 10 Frogs vs. Storks achievements.
Eat 50 eggs.
Eat 100 dragonflies.
Eat 100 golden eggs.
Eat 50 mosquitoes.
Play through 40 levels.
Get the maximum score in 40 levels.
Get the maximum score in 20 levels.
Finish a generated level.
Play through one stage.
Get the maximum score in one stage.