If house wrens have not bothered blues, is there any reason to stop them from nesting? I am lucky enough to have 3 acres-most in cedar thickets-which is where the house wrens nest. In the small amount of grassy field I have are 3 BB houses( 1 is occupied by Tree Swallows) These 3 houses have been sucessfully used for years with no wren probs. There are 2 other boxes used by wrens. I don't know if I'm just lucky or what but have always let the wrens have the 2 boxes in the thicket & the blues & trees sort out who gets the others. All the houses are on poles & baffled. I don't have House Sparrows-thank heavens!I enjoy the wrens bubbling song & would use wren guards if needed but don't feel pulling out their sticks is necessary in my case-what do the experts think? By the way I have learned alot from this forum about baffling & so forth. Thanks for all the good advice.