An environmental group is urging Ontario to halt all logging and road building in endangered woodland caribou habitat.
The Wildlands League says six out of nine known populations below the 51st parallel are at risk of collapsing.
The group says the habitats of six caribou populations have already been disturbed by logging and fires and may not be able to sustain the animals.
Woodland caribou are among the first species to be actively protected under Ontario's new Endangered Species Act.