I have a rule that I only publish at the most, one post a day. However, this is too good not to share today. At first light this morning I was out taking down the old swallow nesting boxes and putting up the new improved version. The new slot design is to keep the hated House Sparrows out. The slot is only 7/8" by 3", instead of the traditional larger circle. At 8:05 AM we had our first visitors, and it was not the hoped for Swallows, but the demon House Sparrows.
Hey, a new nesting box!
Ugh, too tight
"What did you do, to my house?"
The design appeared to work, only time will tell if it keeps the Sparrows out.