If after a few seasons there are no residents, try relocating the nest box. A research kit may be obtained from the Cornell laboratory of Ornithology's Nest Box Network Program. It includes information on such topics a monitoring nest boxes, predators and competitors, taking field notes, the feather study, the calcium study and other topics as well. Currently there is not enough scientific data to make a clear judgment on whether one should remove the old nesting material after the breeding season or leave it in the nest box. NatureCraft will provide information as it becomes available.
Males have bright blue heads, tails, backs, and wings.
The sides, flanks, and throat are chestnut red. The underparts are also chestnut red from the chin down to the belly, but the belly is white. Although there is much variation in the plumage, females are generally less colorful than males. They have light gray-blue heads, dull brown backs, and blue tails and wings. There is a slight white ring around the eye.