The big dark birds circling over the ridges along this stretch are turkey vultures and black vultures — the cliff country's cleanup crew, riding thermals by day and roosting on the same rock walls hikers walk beneath. This segment is the tour's wildlife briefing: how to watch the gliders work the ridgelines, plus a listening list for the gorges ahead — the winter wren's long silvery song in the cool hemlock bottoms, the Acadian flycatcher's single sneeze of a call, and the salamanders running the damp leaf litter at boot level. It closes with honest reassurance: this is gentle country, where the boldest animal most visitors meet is a chipmunk eyeing the picnic.
Roll a window down a crack if the weather allows, because this next stretch is for your ears as much as your eyes. But first, the eyes: somewhere over these ridges right now, odds are good a vulture is carving slow circles on the rising air. Two kinds work this country — turkey vultures and black vultures — and between them they're the sanitation department of the cliff country: patient, efficient, and surprisingly graceful for birds with such an unglamorous job description. Watch one ride a thermal today if you get the chance. Barely a wingbeat — just endless banking turns, as if the sky were an escalator only they can see. And when evening comes, many of them settle onto the cliff faces themselves; those rock walls you've been admiring all day double as vulture housing, ledge by ledge. Now the ears. The cool gorges still ahead of you keep their own soundtrack, and two voices are worth knowing. The winter wren is the headliner: a tiny brown bird with an impossibly long, silvery song that tumbles on and on, completely out of proportion to the singer — once you've heard it pour out of the hemlock shade, you don't forget it. Sharing those shadows is the Acadian flycatcher, whose whole vocabulary is one quick, bright note — like a tiny sneeze from the shadows. Catch it once and your ear will own it for good. Underfoot, the wet leaf litter along every stream belongs to the salamanders going about their quiet business; you'll rarely spot one, but the gorge floor below every trail is busy with small lives, down to the shadow under the last wet stone. And if anyone in the back seat is hoping for — or worrying about — something bigger: this is gentle country, truly. The most serious wildlife confrontation at most picnic tables here involves a chipmunk demanding a toll. So that's your nature briefing for the northern hills: gliders above, singers below, and a forest floor that never stops working. The hills hand you all of it for free. All they ask is that you look up now and then, and keep one window's worth of listening open.