But when it comes to favoring one native songbird over another – either within a species, or of a different species (with the possible exception of HOWR, who are very destructive) – I tend to let the birds sort it out themselves.
Like right now I have a pair of BHNU in the box that the EABL typically use and I am SO happy! Those little guys are the cutest things. They do have a hole reducer, though, to keep those raiding blue shoulders out of there. They won the box by starting first and deserve a little bit of help.