284 | 365 Free Rent

We have had this birdhouse for 4 years, have had it in 3 different locations, have put food out for prospective owners, and absolutely no takers.
 
Not one bird has been interested in making their home here. Nests in the tree, yes. Nests in a nice sheltered birdhouse. No.
 
If a bird doesn’t take the offer soon, might have to put it on the ground and see if any rats are interested in moving in.
 
Any suggestions?