The Mountain Bluebird is the only bluebird that nests in alpine parkland and high elevation open areas.
I think the robins and bluebirds will appreciate the feast they offer.
Woodpeckers, screech owls, chickadees, nuthatches, bluebirds , tree swallows and some flycatchers need them.
House sparrows and starlings seem to not care for the design of the house but tree swallows, bluebirds , chickadees and wrens really like it.
Redbirds, bluebirds , robins, bobolinks, scarlet tanagers, Kentucky warblers, and orchard orioles strut and sing like the cast of a turn-of-the-century revue.
By the way, I've been called to task for not mentioning that safflower seed is very popular with cardinals, chickadees, blue jays, doves, house finches, wrens, titmice and even bluebirds .
If you haven't attracted bluebirds or tree swallows by late spring, close your box up or take it down, but do not let English sparrows, vicious predators, take over any box.
The pair compared data from studies covering 18 different species, including dwarf mongooses, meerkats, Florida scrub jays, western bluebirds , and Australian magpies.
I saw mockingbirds and bluebirds on my slow drive back, but grosbeaks, tanagers, kingbirds, and buntings are apparently not back yet.
Bermuda's native bluebirds can be seen in the many bluebird boxes lining the golf courses (every course on the island has a monitored bluebird trail).