While searching for a pattern of Uncle Sam to put on 4x4's, I came across this lady's site.
It is mostly painted gourds but the ideas could be used on anything... especially bird houses.
Each item has detailed close ups! Especially like the close ups of the Buzz-off gourd!
And, I never did find an Uncle Sam pattern, so if any one knows of one..please share!
Here is a link that might be useful: Site with closeups!