Circumboreal
Guides
Boloria freija
Freija fritillary
Boloria freija is a circumboreal fritillary butterfly found in Arctic and subarctic habitats across the Northern Hemisphere. The species exhibits a two-year life cycle, with larvae feeding on specific bog and tundra plants including cloudberry and various Ericaceae. Adults are active during brief summer periods in northern latitudes.
Boloria frigga
Frigga Fritillary
Boloria frigga is a circumboreal fritillary butterfly distributed across northern bogs and tundra habitats. The species exhibits a biennial life cycle, producing one generation every two years. Larvae feed on specific bog plants including cloudberry (Rubus chamaemorus) and small cranberry (Vaccinium oxycoccos). The species name derives from Frigg, a goddess in Norse mythology.
Dismodicus decemoculatus
Dismodicus decemoculatus is a sheet-web weaving spider in the family Linyphiidae, first described by Emerton in 1882. It is a small-bodied species with a circumboreal distribution across northern North America and Greenland. The specific epithet "decemoculatus" (Latin for "ten-eyed") refers to its eye arrangement. Like other linyphiids, it constructs horizontal sheet webs to capture prey.
Estrandia grandaeva
Estrandia grandaeva is a small sheet-web spider in the family Linyphiidae, first described by Keyserling in 1886. It has a broad circumboreal distribution spanning northern North America, Europe, and Asia. Like other linyphiids, it constructs flat, horizontal sheet webs with a retreat area and an overlying tangle of threads to knock down prey. The species is found in cool, moist habitats across boreal and montane regions.
Hybauchenidium
dwarf spiders
Hybauchenidium is a genus of dwarf spiders in the family Linyphiidae, first described by Å. Holm in 1973. The genus contains four species distributed across high-latitude regions of the Northern Hemisphere, including boreal and arctic areas of North America, Europe, and Asia. Species in this genus are small-bodied spiders characteristic of the sheet-web building Linyphiidae.
Oeneis jutta
Jutta Arctic, Baltic grayling
Oeneis jutta, known as the Jutta Arctic or Baltic grayling, is a butterfly of the subfamily Satyrinae with a Circumboreal distribution spanning northern Eurasia and North America. The species inhabits cold, open environments including bogs and tundra. Larvae feed primarily on sedges and cottongrass, while adults nectar on Ledum palustre. The species exhibits a flexible life cycle with one generation every one to two years depending on location.
Saldula saltatoria
Common Shore Bug
Saldula saltatoria is a Holarctic shore bug with circumboreal distribution, widespread across central Europe and often occurring in large numbers. It is an active predator of small invertebrates inhabiting diverse shoreline habitats. The species shows remarkable ecological flexibility, occurring from small water bodies to large lakes and rivers, and from sea level to over 2000 meters elevation in alpine regions.
Syngrapha interrogationis
Scarce Silver Y Moth
Syngrapha interrogationis, commonly known as the scarce silver Y, is a noctuid moth distributed across northern regions of the Northern Hemisphere. The species ranges from Alaska and Canada through Iceland, Europe, and Siberia to Northeast Asia including Japan. Adults display the characteristic silver Y-shaped mark on the forewings typical of the Plusiinae subfamily. The species is considered scarce or locally distributed in parts of its European range.