kiloByte12,443 Locked 07 Feb 2023 07 Feb 2023
This one is pretty simple - just play a bird such as House Wren, with the ability "Play another bird into the same habitat. Play its normal food and egg cost." Be sure it isn't the 5th/last bird in the habitat.
Many players will unlock this naturally within a few games of normal play. Be advised that these types of birds are typically low cost, low egg capacity, and low point value.