Keep an eye out for invasive species, from February 26— March 3, 2024 and beyond.

National Invasive Species Awareness Week logo

National Invasive Species Awareness Week (NISAW) is  February 26— March 3, 2024. NISAW is a nationwide event to raise awareness about invasive species, the threat that they pose, and what people can do to prevent their spread.  An invasive species is a plant or animal that is not native to a particular ecosystem, whose introduction does or is likely to cause economic or environmental harm, or harm to human health. It is capable of moving aggressively into an area, monopolizing light, nutrients, water, and space to the detriment of native species. 

UNH Extension’s Forestry and Wildlife Program focuses a great deal of time and effort on educating landowners and communities about invasive species, and helping them figure out how to manage invasive species. Everyone can play a role in managing invasive species. Invasive species impact everyone. Here are five ways you can help!

1. Learn about & REPORT invasive species

To learn about  insects and diseases threatening New Hampshire’s forests and to report suspect insects or tree damage, visit to To learn about invasive plants in New Hampshire, go to

2. Volunteer

Volunteer to help remove invasive species from public lands and important natural areas. Nature Groupie maintains a list of upcoming events.

3. Don’t move firewood

Instead, burn it where you buy it. Invasive insects are transported by humans, often in firewood. Find more information at

4. Choose native species

If you’re planning to plant in your yard this year, choose native species. For trees, consider their susceptibility to invasive insects.

5. Spread the word

Help us get the word out about invasive pests. Follow NHBugs on Facebook and share posts with your friends and family.

Some invasives of concern include emerald ash borerhemlock woolly adelgid, and elongate hemlock scale. This spring and summer, keep an eye out for invasive plants including glossy buckthorn, garlic mustard, and Japanese knotweed. Below are pictures of just a few invasive species to look for in New Hampshire's forests and fields.

Have a question about your woods? Contact your Extension County Forester today!

Contact Your County Forester

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Extension Field Specialist, Forest Resources
Phone: (603) 862-3883
Office: Cooperative Extension, Nesmith Hall Room 224, Durham, NH 03824