Just before sunset in a hotel parking lot in west Wichita, Bob and Nancy Livingston are prepping for what looks like a mini tailgate party. Bob Livingston hops up onto the gate of his pickup, and Nancy sets out a lawn chair.
Then they look toward the sky, and wait.
“We come every year,” Nancy Livingston said. “It’s just amazing seeing all these birds, and we are purple martin landlords.”…