ITHACA, N.Y. (AP) — Researchers are looking for volunteers to help out in a study of how artificial light might affect the lives of barn swallows.

The study is being done by researchers at Cornell Lab of Ornithology, Syracuse University and Globe at Night, an international citizen science campaign that measures nighttime light pollution.

The new study will investigate the impact of nighttime lighting on the circadian rhythms of barn swallows, which have adapted to live and nest almost exclusively on human-made structures like bridges and barns.

Caren Cooper of the Cornell Lab and Margaret Voss of Syracuse University are asking study participants to measure and report light levels near barn swallow nests after sundown.

You can sign up for this and other research through Cornell's NestWatch at: www.nestwatch.org.

(Story by: The Associated Press)