With birdhouses, restricting the entry hole size will typically restrict the size bird that may enter and nest. Large holes will admit more bird sizes and perhaps crowd out smaller, less defensive species but small holes may leave the house unused if that small species isn’t around.

With a hole sized for the largest desirable bird already bored one might create a circle of wood, with additional holes bored in the style of a rotary telephone dial, and mount it similarly to the face of the birdhouse. This way, the desired hole size may be dialed to line up with the entryway, and pegged in place.
-- whatrock, Jan 29 2016

(??) other uses for small birdhouse entrance https://www.youtube...watch?v=ZoCSCLIXn6U
[pashute, Feb 02 2016]

Version 1.0 https://imgur.com/fXHfUSq
Holes kinda big, v2.0 will be sized more for songbirds [whatrock, Oct 12 2020]

Add a motor, and it could double as a mincer.
-- MaxwellBuchanan, Jan 29 2016


[Ian Tindale] is not only stranger than we imagine, he is stranger than we can imagine.

Incidentally, the Eurasian Lorikeet is one of the very few birds whose chicks are larger than the adults. Females of the species, when breeding for the first time, will sometimes select a tree-hole large enough to admit them, but too small to allow the chicks to exit. This is one of those baffling failures of evolution.
-- MaxwellBuchanan, Jan 29 2016


Hmm, these must be much larger than ordinary birdhouses, one could even say they might be giants.
-- not_morrison_rm, Feb 03 2016


What you need here is one of those dilating iris doors.
-- RayfordSteele, Feb 03 2016


..who watches over me. But I'm sure it's NSA or GCHQ really.
-- not_morrison_rm, Feb 04 2016


I always thought that was the job of Universe Man.
-- RayfordSteele, Feb 04 2016


I think this is brilliant, and as an avid bird watcher/lover, I want to take this moment to thank thee, [whatrock], for creating an answer to this birdy dilemma.
-- blissmiss, Feb 05 2016


Pleased I could bring you bliss [miss].
-- whatrock, Feb 05 2016


Baked!

OK, I baked it, only moi and not some vendor or other. It's kinda clunky, version 1.0 but fully functional. A large bird will be well-pleased with the available volume; a little wren or chickadee may indeed get lost in there.

Yay me!
-- whatrock, Oct 05 2020


Nice! Yay you indeed.

Link? Maybe a picture...
-- 2 fries shy of a happy meal, Oct 05 2020


^ Help me if you would, I'm new to this bit: how do I get a picture up and available for all to see?
-- whatrock, Oct 05 2020


Well, you need a digital camera or a cell phone which takes pictures. Save images you want to your computer in a jpeg format.
I'm cheap so I found a free image hosting site. Once you've chosen a site to host your pictures they will have an 'upload' or 'add' button which will ask 'from net?' or 'from your computer?'.
Click 'from computer' and browse your files until you find the one you want.
Name it.
Caption it if you care to.
Click on the address at the top of the page and copy, (cntrl c), the address then paste (cntrl v) into the destination section that pops up when you click on [link] here at the halfbakery.
-- 2 fries shy of a happy meal, Oct 05 2020


The Admins can give users permissions to add inline illustrations. It is, however, a rare and precious privilege.

You could email She Who Must Be Obeyed and ask very, very nicely. Self-abasement, grovelling, and banging your forehead on the floor while crying "I am not worthy !" may have the desired result.

Or then again, perhaps not.
-- 8th of 7, Oct 05 2020


This brings to mind something I was thinking this morning. On our semi-sometime Zoom meet-ups, we could have a gathering whereas we all, or those who wish to, bring something you have made, or tried to make from the bakery, to show and tell. It could be fun. This is a perfect example. [whatrock], we must be psychically in synch.
-- blissmiss, Oct 05 2020


[8th] I contacted SWMBO and begged for permission and received valuable enlightenment. In the interest of saving disk space I went with an outside host (thanks [2fries]).
-- whatrock, Oct 12 2020


Good show!
-- 2 fries shy of a happy meal, Oct 12 2020


// [whatrock], we must be psychically in sync //

Omm, [blissy] what word am I thinking right now? Yes, "sushi", very good!
-- whatrock, Oct 13 2020



random, halfbakery