The Hawkweed Biocontrol Consortium in North America supports the testing and approval of biological insects on invasive exotic hawkweeds. The Hawkweed Biocontrol Consortium website is a comprehensive database with information on identification, biology, research, resources, and the biological control of the hawkweed complex in North America.
Hawkweeds can invade forest habitats. Photo by Linda Wilson.
Many thanks to all the contributors of the information on this website. Much of the content on this website was taken from the Key to Identification of Invasive and Native Hawkweeds (Hieracium species) in the Pacific Northwest" by Linda Wilson, 2006. The hawkweeds are quite complex and we hope the data here helps clarify these species and serves as a valuable resource for your weed management efforts.