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Lemming years and the owl irruption

Norway lemming among mountain vegetation
Norway lemming. Photo: Lakkahillo, CC BY-SA 3.0

Norway lemming (Lemmus lemmus); snowy owl, short-eared owl, long-tailed skua, rough-legged buzzard, arctic fox — all breeding only in peak years. Dovrefjell, Hardangervidda, Finse, Varanger and the Finnmark tundra, Norway.

Best time: 15 Jun – 31 Aug (June to August). Where: Finse (Hardangervidda, Bergen railway), Dovrefjell (Hjerkinn – Kongsvold), Varanger peninsula (Komagdalen, Hamningberg road) (Norway). Time of day: Round the clock under the midnight sun.

Open it in the interactive calendarSunrise and sunset listening times for the day you pick, and the map.

When is the best time?

Peak: 15 Jun – 31 Aug. Mid June to August in a peak year — cycles run 3–5 years and are unpredictable; last strong nationwide peak 2011, moderate ones since

Active from 1 Jun to 30 Sep (June to September) in a typical year.

Time of day

Round the clock under the midnight sun; lemmings and the owls are most active in the 'dusk' and 'dawn' hours 22:00–04:00, and the wind often drops around 02:00.

What will you hear?

Lemmings squeaking and chattering from every tussock and running across the trail, long-tailed skuas mewing, snowy owl barks and short-eared owl wing-claps, rough-legged buzzard mewing, arctic fox yips at a den; in a crash year, silence.

Binoculars?

Binoculars essential. Lemmings run across the trail, but snowy owls, skuas and buzzards are 200 m+ out on the tundra; binoculars needed, scope for owls.

Where to go

How to go on your own, and what it costs

Finse: Bergen railway to the car-free station, walk the plateau paths. Dovrefjell: Hjerkinn and Kongsvold car parks and the marked trails; 200 m from arctic fox dens. Varanger: the E75 and the Hamningberg road give roadside tundra. Watch artsobservasjoner.no in May before booking.

Cost: Free.

Field-recording notes

The only way to plan this is to watch artsobservasjoner.no and the Fjellrev (arctic fox) project reports in May — if lemmings are reported in numbers, go. A peak year turns the plateau into a ground-level squeak-scape best captured with omnis on the ground; the owls and skuas are the big sound overhead. Arctic fox dens are protected: 200 m distance, no visits without the project. Wind, again, on every plateau; use the lee of boulders and record at 02:00 when it often drops.

Sources

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More: all spectacles in Norway · owls · mountain wildlife · Norway in June · Norway in July · Norway in August