So after enlarge the second 4' door to 12', is it still necessary to open another side entrance of 4' to enter the 30x12 room from the roving room?

Bro check it out this blog http://swiftletslover-jblim.blogspot.com/2...rds-nest-4.html

The owner of this bird house use half of the A4 size paper to build fake bird nest.

Cheaper and easier.

My 2 cents' worth.

Silly idea, sorry to say. Hate to comment on something very old as in V1. Wanna try something, you must have something more rigid than paper folding............

So after enlarge the second 4' door to 12', is it still necessary to open another side entrance of 4' to enter the 30x12 room from the roving room?

If that was my BH i would just do something like this. Have the roof top opening's entrance on other side instead. This way it is easier to control light and less wastage.

And personally I don't like these so called VIP rooms, never worked for this. Just my humble opinion.

I think this design is much better.

If New BH, FLIGHT not Light.

One Suggestion: Sliding doors.

There are really many of such successful BHs around and the only difference between us is that I share but they didn't for reasons known to all here and some personal ones, too. Sucessful ones in towns and well as on agriland but more difficult on agriland due to many known problems.

Having a few thousand over a few years isn't very difficult if you get all rights; Right place, Right timing and Right conditions and you can see the growth that you never seen before......... there are still such luck now but no one is telling.

Even now, out of hundreds new BHs, there are some very successful ones, some average but most of them slow or fails as there are some many new BHs with not many owners willing to allow the birds to breed ( excluding me and some here of course). Their aims now focus more on better quality nests fetching premier price meaning white nests so they will remove nest before the birds lay their eggs and after the birds lay their eggs........no shit on the nests, you get prefect nests with no stain at all.

Which way is better of the two evils, someone did ask me and I did advice some and has since regretted telling them as they are doing what I told them to do which isn't good for the growth of the birds.

The most honorable and humane way is to allow the birds to fledged and thus repaying "the duck that lay golden eggs" and helping others to grow and also you; you may have thousands nests but afew more thousands would be better, right? The most importance of all, your own soul! Just by allowing the birds to multiply and fledged and just one successful BH can and do support 10 BH in the area. Just imagine that the 10K nests BH allow their birds to fledged and there shall be approximately 20K new birds and that's just one time and most new BHs ask for only 100 nests in a year and so you need only to capture their 5% fledged birds; you got three times to try in a year.

If only that the Chinese now insist on brown nests (after the RED nests and the bleaching whites) to be the most healthiest and safest then I would be blessed.

sosos, where your BH located?

thanks good advice. even my bh only 107 nest 2 years......

Thanks northface and jo yeo for giving me more idea on how to design my future bird house. actually, have one BH done by sifu which is very similar to northface plan. but the top entry is only 6'x6' and the result is ok so far.....
anyone have more idea on the design to share??

You mean the roof opening only 6x6? That's too small in my opinion, normally at least 10x10 in fact mine all 12x12. The inner wall opening can be 6x6 la, I would think if growth is slow you can try open the roof wider and you will see good results. 

thanks good advice. even my bh only 107 nest 2 years......