▪ Berries fruit in the mountains, bringing bears into the meadows.
▪ Orb-weaving spiders reach peak size and mate.
▪ Southern resident (or Salish Sea) orcas leave at the end of the month.
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▪ Rivers reach their lowest flows.
▪ Two weeks after the first thorough rain of the fall, mushrooms sprout, including chanterelles and boletes.
▪ Huge wracks of eelgrass and kelp wash up on beaches.
▪ Migrating birds of prey ride thermals near ridge tops.
▪ Douglas fir cones open, releasing seeds to the wind.
▪ When big-leaf maples lose their leaves, mosses and licorice ferns on their branches start growing.
▪ Rough-legged hawks arrive from the Arctic, along with a variety of hawks and owls that winter in the area.
▪ Snow geese arrive.
▪ Gray whales migrate south.
▪ Chinook, coho and chum salmon begin running in Whatcom Creek and continue into December. Coho and chum begin running on Chuckanut Creek and continue into December.
▪ Black bears den and enter a modified form of hibernation known as torpor. Though drowsy, bears still can defend themselves and their cubs should a predator threaten.
▪ Brant arrive at Padilla Bay.
▪ Trumpeter swans arrive.
▪ Mosses mate, their sperm swimming through rainwater. Their spore bodies form over the winter.
▪ Varied thrushes appear in inhabited areas of the lowlands.
▪ Extreme high tides of winter are pushed higher still by November storms.
▪ Most slugs go into hibernation.
▪ Coho and chum begin running in the Nooksack River and Squalicum Creek, and continue into December.