Paper Birch

Pollinator Value

🔑 Keystone: Betula is a keystone genus in the northern forest, supporting 403 lepidoptera species in the Ottawa ecoregion. Paper birch hosts iconic species including Mourning Cloak (Nymphalis antiopa), Green Comma (Polygonia faunus), and White Admiral (Limenitis arthemis). The genus also provides critical browse, seeds, and buds for overwintering birds and mammals including Ruffed Grouse, Black-capped Chickadee, and American Beaver.
S13 403 lepidoptera; S10 faunal associations; S57 bird diet records
🐛 Larval Host: Habrosyne scripta, Furcula scolopendrina, Polygonia faunus, Limenitis archippus, Ceratomia amyntor, Amorpha juglandis, Nymphalis antiopa, Paonias myops, Lochmaeus manteo, Orgyia definita, Acronicta interrupta, Sphinx kalmiae, Pyrrharctia isabella, Synchlora aerata, Limenitis arthemis
S13+S15 15 verified Eastern NA
❄️ Winter Food Source: Buds and catkins are consumed by Ruffed Grouse and Spruce Grouse through winter; Willow Ptarmigan rely on birch as a significant winter food source (8.4% of diet by weight). Seeds persist into winter and are taken by Pine Siskin, American Goldfinch, Black-capped Chickadee, and Dark-eyed Junco. Yellow-bellied Sapsucker drills sap wells in thin bark.
S57 Ruffed Grouse, Spruce Grouse, Willow Ptarmigan diet records; S10 seed and bud consumption by birds

Proximity Score: 0
Native Status: ✅ Outaouais ✅ Ottawa ✅ QC ✅ ON
Closest Direction: Local
CEC Eco-Regions: 5 – Northern Forests, 5.2 – Mixed Wood Shield, 5.2.3 – Algonquin/Southern Laurentians
Rarity Notes: Globally secure (G5) with IUCN status Least Concern. Ranked S5 in both Ontario and Quebec, indicating widespread abundance. Not listed under SARA or COSEWIC. One of the most widely distributed birches in North America, with a transcontinental range from Newfoundland to Alaska.
S22 G5, IUCN LC, S5 ON/QC; S26 not SARA listed; S41 most widely distributed birch
Rarity Ranks: QC S5 – Secure, ON S5 – Secure
Migration: Stable
Ecological Context: Paper birch is a characteristic pioneer tree of the northern forest, rapidly colonizing areas disturbed by fire, logging, or windthrow. In the Laurentian region it forms a distinctive association with trembling aspen and conifers, thriving on well-drained sandy loams on cool moist sites. It grows on a wide range of substrates from rocky outcrops to muskegs but achieves best development on deeper, well-drained glacial soils. A fast-growing but short-lived species rarely exceeding 140 years.
S12 characteristic element of Laurentian forest; S41 pioneer on fires/logging, best on sandy loams; S10 pioneer species, upland woodlands

Roles: Fire Retardant, Fortress/Barrier, Nurse Plant, Nutrient Accumulator, Wildlife Habitat
S73/S29/S72 Evidence: Fire Retardant: S73 [MEDIUM]: S11 Fire Tolerance = High (not definitional)] | Fortress/Barrier: S61 keyword match: thorns? (supporting signal only)] | Nurse Plant: S10 keyword match: pioneer (supporting signal only)] | Nutrient Accumulator: S72 Hemenway (tables: 6-2, 7-2, pp. 96, 116)] | Wildlife Habitat: S72 Hemenway (tables: 6-2, 7-2, pp. 96, 116)]
Notes: Paper birch functions as a canopy-layer nutrient pump, cycling phosphorus, potassium, and calcium from deeper soil horizons into leaf litter. Its rapidly decomposing litter enriches surface soils with Ca, N, P, Mg, and K compared to conifer litter. As a pioneer, it creates sheltered conditions for shade-tolerant successional species. Good plant near compost heaps, aiding fermentation.
S72 nutrient accumulator; S41 litter enrichment study; S29 compost heap benefit; S10 pioneer creating conditions for succession

Category: Antirheumatic, Astringent, Febrifuge, Sedative, Dermatological Aid, Diaphoretic
S29 antirheumatic, astringent, febrifuge, sedative; S28 dermatological aid, diaphoretic, burn dressing, pediatric aid
Notes: Widely employed medicinally by many First Nations. Dried, powdered bark used for diaper rash and skin rashes (Algonquin, Cree). Decoction of inner bark used as a wash for skin sores and internally for dysentery. Bark poultices applied to burns. Decoction of wood taken as a diaphoretic and to promote lactation. Bark also used to make rigid casts for broken limbs. Health Canada lists bark extract as an approved topical skin-conditioning agent.
S29 traditional uses; S28 Algonquin/Cree dermatological, diaphoretic uses; S36 NHPID approved topical skin protectant

✅ Edible

Foraging Notes: Sap can be tapped in early spring and consumed as a sweet drink, concentrated into syrup, or fermented into birch beer. Inner bark was traditionally dried and ground into flour by many First Nations as an emergency starch. Young leaves, shoots, and catkins are edible raw or cooked. The Algonquin of Quebec made syrup from the sap. Inner bark is generally considered a famine food.
S29 sap, inner bark, leaves, shoots edible; S28 Algonquin Quebec sap as syrup; S29 inner bark as famine food