Reference article
Thatch Egg
Thatch Egg is an egg for creating a new duck in the Mountains shop.
Obtaining it
Buy it from the 
Mountains shop with 
Coins.
Use
The purchase opens duck creation to add another member to your 
Ducks.
Hatched duck
This example shows the egg’s colour and pattern. You can choose the duck’s hairstyle and eyes in the duck creator.
