The Aviary Egg was first seen on FarmVille on September 7th, 2011 when the Aviary was released. When harvesting their Aviary, farmers have a chance of finding a Aviary Egg. Farmer's are able to share 3 Aviary Eggs with their Neighbors and keep one Aviary Egg for themself.
Once placed on a farm, Aviary Egg will hatch in after a number of days time or can be hatched immediately using cash.
The different types of Aviary eggs are: