Using oversized weed cutters to get rid of invasive species along the Kishwaukee River headwaters Saturday morning was familiar work for a group of Woodstock High School students.

The four girls joined volunteers on national Make a Difference Day to clear away invasive species from the site at Route 14 and Dean Street, as well as cleaning up trash to improve the natural habitat for native plants and animals.

“I’m used to picking invasive species,” said senior Emily Bradley, who has participated in similar volunteer efforts. “It’s really just picking out Queen Anne’s Lace and buckthorn [plants.]”