When player bought the block, player can purchase aviaries to place them on any blocks player have.
The cost for installing an aviary on a particular site differs, depending on the level of respectability of this site.
Aviaries can be inhabited by various animals and stacking several of the same aviaries - they can be upgraded with one aviary inhabited by more predatory animals.
Getting on players field with an established aviary, other players will have to pay the player not only the cost of a day's rent for staying on your Block but also an additional fee, depending on the levels and number of aviaries.
The maximum number of enclosures in one area is four. Aviaries also need to be sold evenly. Player can buy or sell aviaries at any time, and as much as player see fit, and as much as your financial situation allows. Aviaries cannot be built if at least one section of a given color group is laid.
Aviaries can be populated with:
Hamsters - Increase gains on block on 0.7% In the game simultaneously there may only be 15 Hamsters.
Bears - Increase gains on block on 1.3% In the game simultaneously there may only be 13 Bears.
Bulls - Increase gains on block on 1.7% In the game simultaneously there may only be 9 Bulls.
Whales - Increase gains on block on 2.5% * In the game simultaneously there may only be 6 Whales.
At the same time, no more than four aviaries can be installed on one site.
Player cannot immediately populate whales, bulls, or bears into the aviary. Improvements will have to be carried out gradually, starting with cute and harmless hamsters.