Not familiar with the Bird House but I may have been to the Great Alaskan Bush Company.
Ahh, good ol' ABC....middle of Alaskan winter , usual ankle deep snow at the doorway , not that much warmer inside , as we kept our jackets on . Had to hand it to those gals on the stage; ; definitely no temperature problems for them . I did wonder what was their secret....
F Station/Humpy's a little more refined .