Any more about perches?
When and where possible the perch should be facing light, possibly directly in front of a window. The additional light encourages egg production, especially in the darker days. The perches should be kept very clean and additional attention should be given to the ends of perches which could harbour mite etc, Feed on birds during their long roosting period, during the night. (When possible below the window, usually shaded, is suitable for the nesting box area).