Standard thistle feeder modification.
This type feeder hangs from a pole off my back deck or could be used hanging from a tree branch.

I have found an approach to attracting many species of birds with water that overcomes much of the undesirable maintenance while offering exceptional bird viewing at close range.  The method presents water in a creative setting that emulates a ‘micro’ natural environment on a deck or patio.  Water is magic relative to birding watching.  Every bird needs to drink, thus, you can attract many species of birds including warblers that are not attracted to feeders.  Overall advantages: relatively easy to install and maintain, and provides a pleasing accent to a deck or patio landscaping.

Eastern Bluebird nest boxes are highly susceptible to attach by predators such as cats, snakes, rats and raccoons.  This design technique was developed for easy construction and installation in the field.  The approach was used to install 20 Bluebird nest boxes on the Lewis Birding Trail at the Huntsville Botanical Garden.