Kristin Pink, ecologist with the Cook County Forest Preserve District, looks at swamp thistle as she visits restoration sites at Palos preserves near Palos Park on Sept. 10, 2020.

Thistles may be best known for their spiny leaves and stems. I think of them as going by the philosophy, “The best defense is a lot of sharp points,” like cactuses and roses. A thistle’s ...

European swamp thistle crowds out native swamp thistle in wetlands. Invasive narrow-leaf cattail out-competes and is now hybridizing with native broad-leaf cattail.

LANSING--A new creepy crawly is slithering over natural areas and destroying native plants in the Upper Peninsula, wildlife experts warn. European swamp thistle is spreading rapidly throughout ...

There are at least nine different species of thistle in Florida which include tall thistle, Leconte’s thistle, swamp thistle, Nuttall’s thistle, purple or yellow thistle, bull thistle, and ...

For the first time in many decades, tiny rust-colored swamp metalmark butterflies are fluttering around northern Illinois. Last week, biologists from the Peggy Notebaert Nature Museum in Chicago ...

Florida thistle species include tall thistle, Lecontes thistle, swamp thistle, Nutalls thistle, purple or yellow thistle, bull thistle, Virginia thistle.

The story starts as Col. Maranta, a praying mantis guide, briefs Agent 9, also known as a Junior Master Gardener, on Operation Thistle. Agent 9 must learn about plant growth and development in order ...

They need an abundance of their larval host plant, swamp thistle. NatureServe Explorer estimates that about 100 pockets exist in the United States where the swamp metalmark live, ...

That day, amateur lepidopterist Troy Shively and his grandfather, Ralph, spotted a swamp metalmark. The metalmark, Calephelis muticum, is a gorgeous butterfly and had not been seen in Ohio since 1988.

Special feeders filled with thistle, sunflower seeds and suet attract these diverse bird species, ... Blacklick Woods spans over 640 acres, featuring woods, seasonal swamp ponds, prairies, ...