Invasive Species Report

Invasive species are non-native plants which have been introduced from outside the country. They have a negative impact on the wildlife and habitats due to their ability to spread aggressively outcompeting native plants, causing damage to the environment, human economy and or health.

We commissioned this report to identify such species in the town and to document any significant impacts of these species.

A multidisciplinary walkover survey was conducted on the 15 May 2025 by ecologists Dr. Richard Stone and Dr. Karina Dingerkus. Habitats around the Friary Park, Old Convent Grounds, Riverside Walk, and Main Street. The walkover surveys were designed to detect the presence of a range of non-native invasive species. The survey included a search of all potentially suitable habitat that was publicly accessible.

Eight separate invasive species were recorded within Ballyhaunis town. The majority of these are not of great concern, and are not listed as having high risk.

Japanese knotweed is the most prevalent invasive species with multiple sightings around Ballyhaunis Town. Other species are listed in the table here

Species	Risk of Impact	Irish Status
Japanese knotweed	Risk of High Impact	Non-native established plant
Laurel	Risk of High Impact	Non-native established plant
Spanish Bluebell or hybrid	Low risk of impact	Non-native established plant
Cotoneaster	Low risk of impact	Garden escapee
Box species	Risk not assessed but likely to be low	Garden escapee
Red valerian	Low risk of impact	Non-native established plant
Snowberry	Low risk of impact	Non-native established plant
Gunnera	Risk of High Impact	Non-native established plant

The extent of invasive species in Ballyhaunis is at a low level. Japanese knotweed which is the main concern is currently under treatment from Mayo County Council. It will be important to ensure that all sites are currently being treated and monitored by the council. Gunnera occurs at one location close to the Community Garden.

Raising awareness of the presence and impact of invasive species in the community will help with monitoring and control.

Read the full report by clicking on the button.

Invasice Species Assesment report 2025_09-2025.pdf

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