If your BH is properly done with all the features that will attract any birds that entered you BH, I think the answer is yes.
Just compare these two pictures:
Which one do you think you BH falls into?
The first picture looks very bare, little tweeters, no cluster tweeters and no fake nests.
Do you think this will be something that those birds will be attracted to?
What if you upgrade your ceiling to look more like the second picture.
There will be lots of tweeter, clusters, 90* corners, 130* corners, fake nests, maybe perfume garden and so forth.
At the end of the day you know you BH is better than your neighbours.
The two pictures above were actually the same spot before and after my intervention.
I was asked to revamp this BH and I took lots of trouble to make sure I put in as many gadgets that will make those birds to stay.
Most failed or sick BH have the empty syndrome.
All in all the so called "Consultant" are ignorance about the behaviours of those swiftlet.
They never have the list of things what those swiftlet likes and dislikes.
They keep doing the same thing over and over again.
You as an ignorance person have nothing to say.
At the end of the day your BH is empty and who was at fault?
Emm emmm, not the "Consultant" but you.
Give me a chance to teach you what I know about those swiftlet and see if you can improve your self more by attending my coming seminar on July 1st 2012.
The knowledge you gain will be worth every dollar.
You also will have a chance to visit a stand alone BH that have various features which you might want to copy.
Call 017 7551318 today.