Redwood Region Audubon Society is hosting this informative presentation by Dr. Greta Wengert. The deleterious impacts to wildlife from cannabis “trespass grows” on public lands have only recently been identified as a wildlife conservation issue. Water diversions, poisonings, and habitat modification at cannabis sites are common throughout California’s public and adjacent private lands. The research on this by Dr. Greta Wengert and others at the Integral Ecology Research Center in Blue Lake was featured in a recent National Geographic video. Doors open at 7:00 p.m. and the program will begin at 7:30 p.m.