Photos of the completed flyway, outside and inside.You can see that the near end (as well as the far end) have a solid roof. The east and west sides and roofs are of wire mesh.
This arrangement allows birds to find shelter or remain in an open environment.

Exterior of the entire building fron the North East corner.

Looking south along the west wall.  The door enters the corridor  leading to the three interior rooms.

Turning the corner at the southern end. The door on the left enters room1. The door on the right exits the flyway at the south end.

Looking south along the east wall. The door on the right enters room 3.

Inside, looking at the entrance at the North End.