Most of what lives in a forest never shows itself to a visitor. Camera traps, tracks, scat, and a lot of patient, quiet sitting are how we build a picture of who's really sharing the land.
Shy, mostly nocturnal, and a useful indicator species — martens need mature forest with plenty of denning cavities, so their return to a site usually means the habitat structure is recovering well.
The largest woodpecker across much of its range, and something of an ecosystem engineer — the cavities it excavates get reused for years afterward by owls, martens and bats.
Slow-moving and easy to miss, but a reliable signal of stream water quality — they're among the first species to disappear from a site once runoff or sedimentation gets bad enough.
We run a rotating set of motion-triggered cameras across a handful of fixed points, mostly along game trails and stream crossings, and leave them for four to six weeks at a time before checking and relocating them.
It's slower and less exciting than it sounds — most captures are the same handful of resident animals passing the same spot repeatedly. The value is in the pattern over years, not any single photo.
Cameras cover fixed points; tracking on foot covers everything in between. A good snow morning or a soft patch of mud after rain tells you more about who's actually moving through an area than weeks of camera footage.
None of this is exotic knowledge — it's mostly patience, repetition, and being willing to get your knees wet.