Playful purple martins

I was walking across Lake Wingra Park in Madison this week when some purple martins flew close to me and circled playfully several times. When the rest flew off, one purple martin continued to circle me.
These birds depend almost 100 percent on people for housing and fly around us when walk because we stir up bugs for them to eat. Erecting houses for them, bird lovers have their very own flocks year after year.
Photo courtesy of Purple Martin Conservation Association purple http://www.purplemartin.org/main/info.php