Inside Aviary

[Cassandragrenr]

So I'm thinking about building this Aviary, but I'm wondering if I'd need an inside one for them? During winter it can get between 27 and 30 degrees Fahrenheit. Would I need an inside enclosure for them or just put out small shelthers for them inside the aviary?
(Picture isnt mine, but this is what I'm planning on building!)

 

[aart]

They would need some area that would block wind/rain/snow.