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Humboldt Redwoods State Park Naturalist John “Griff” Griffith is back with another informative science lesson.

In today’s episode, “Griff” riffs about the symbiotic relationship between spotted owls, Humboldt’s flying squirrels, Douglas firs and truffles.

“The Doug fir needs the truffle, the truffle needs the flying squirrel, the spotted owl needs the flying squirrel and the spotted owl also could use old-growth Doug firs. And when its throwing up at the base of them, it helps kick of this mycorrhizal relationship,” Griff explains in the video. “Isn’t ecology interesting!”

Bonus: Griff also imitates a spotted owl. Enjoy the full lecture in the video embedded above.