Perhaps a hotter take would be that I don't particularly rate the Berlin bird house very highly. It's laid out terribly with multiple repeating exhibits in the wrong continent sections, the walk-throughs are sparse and a lot of the cages are sparse-r. Saving graces come in the form of the several rarities and the brilliant kiwi room. The Tierpark's Pheasantry is far superior to me.
That being said...I think the Zoo's Pheasantry is very good and a standout of the zoo that isn't mentioned enough.
I actually prefer the Pheasantry at Zoo Berlin too - although I hold both in high regard.
The Pheasantry at Tierpark Berlin - which obviously isn't a bird house per se, and as such is something of a digression - used to be very good, but is now extremely run-down and sparsely-occupied sad to say!