Darling is setting up a "harp trap" a 6-by-8-foot rectangular contraption composed of two rows of fishing line strung vertically and spaced several inches apart, like the strings on a harp. At its ...

A harp trap s strings are like fishing line, too fine for even a bat s keen echolocation to perceive. The bats strike the strings and fall into a plastic trough. By 9:30 p.m. bats were falling into ...