Brettski:
Good news! I'll bet you will have little wood ducks this year. I'm glad that you posted that pic. I will be putting up one of those Mallard Tubes and was wondering how close I could put it to the Wood Duck box.
Scott
I just read in preparation for my WD boxes that they are very territorial, at least in regards to other WDs, and to space boxes at least 100 ft from eachother and, if possible, out of the range of sight. Not sure if other duck species would be the same, but 100 feet spacing seems like a safe bet to me.