House sparrows and starlings also make their nests in cavities, and as they extended their range, they began pushing out the native populations of purple martins. Even if the purple martins get to ...

See the scout map: Where purple martins have been seen ... “Over the majority of the purple martins’ range, they are unable to nest naturally any longer. Human-provided nest boxes are the ...

"Something that's kind of relevant to Cherokee County is that back before Europeans settled here, Native Americans would actually hang up empty gourds for purple martins," said Hulbert.