I have built many houses/nest boxes using plans from this source. It is the right price, free so there is no reason to not have at least a look at it.
The designs are very basic, no fancy joints, no even slightly complicate joints so even beginners can build from the plans, great project to get the kids involved in.
Did I mention it was free?
It gives you information on the size of hole, placement of the hole, dimensions of the house, and the like. A good resource even if you decide to build one of your own design.
It is a PDF so as long as you know what to do with that format you will be fine downloading it. I think it is like 35 or so pages long so if you want to make yourself a paper copy it is not too bad to do.
Don't know what to get your Prothonotary Warbler or Pileaed Woodpecker? How about a nice new home.
I mentioned this in this thread:
https://forum.shopsmith.com/viewtopic.php?t=9330
On page three you can see the squirrel house I built from the plans.
In case I forgot to mention it is free.
http://dnr.state.il.us/education/classr ... ODPROJ.PDF
Ed
Wood Projects for Illinois Wildlife
Moderator: admin
Wait Wait for those of you who want to pay for this booklet I have good news for you!!!!!
http://www.amazon.com/Wood-Projects-Ill ... B000E7SXDU
Yes you can buy this booklet!!!!!
Why get it for free when you can buy it??????
So now pick your option and enjoy.
Ed
http://www.amazon.com/Wood-Projects-Ill ... B000E7SXDU
Yes you can buy this booklet!!!!!
Why get it for free when you can buy it??????
So now pick your option and enjoy.
Ed
to poor to pay attention
anyone got a copy I can borrow??? 
'55 Greenie #292284 (Mar-55), '89 SS 510 #020989, Mark VII #408551 (sold 10/14/12), SS Band Saw, (SS 500 #36063 (May-79) now gone to son-in-law as of 11-11), Magna bandsaw, Magna jointer 16185 (May-54), Magna belt sander SS28712 (Dec-82), Magna jigsaw SS4397 (Dec-78), SS biscuit joiner, Zyliss (knockoff) vise, 20+ hand planes, 60s Craftsman tablesaw, CarbaTec mini-lathe, and the usual pile of tools. Hermit of the Hills Woodworks, a hillbilly in the foothills of the Ozarks, scraping by.