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Purple Martin Birdhouse
Purple Martins take very well to bird houses. They are colony nesters.
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Purple Martins in Birdhouse
Purple Martin populations were declining until a group of people got together to promote Purple Martin bird houses. Because Purple Martins are colony nesters, the bird house is more like a bird apartment building.
NPR: National Public Radio
Npr: Skunk Bear: The Mystery of the Missing Martins
Fascinating video about purple martins, their reliance on humans for their nesting places, and the plight that the introduction of an invasive species, the starling, has caused.