Building character feeds a swiftlet.

a building has the character be shape angle building has the size since 2 go up the state within that is appropriate is
- About [story] the temperature,
- About [story] the humidity,
- There is the darkness, what is the size that a person has entered then stare ? doesn't see
- must protect eradicate an enemy has of a bird , such as , gecko , I [ rat ] , a bird is part , etc.
- The inventory that use to give island bird builds nest should the wood that have no a split for protects oneself the chicken mite , hide lay eggs , harm build bird child ,
- hammering wood position the size of the wood and the space must is appropriate
- There is the air passage for decrease the heat and help let off gas from the cause and waste matter of a bird
- the channel that in and out bird are supposed to the size at appropriate the size and a building and the quantity will of a bird in the future and can close can open punctually that want
- set up the amount and loudspeaker position that are appropriate for attract to give a bird come in a lot of building
- must lay cleaning because bird systems are appropriate the quantity of a bird in a building.