Betula occidentalis (Water Birch)
- Distinguishing characteristics and habitat of this species. Provides image of leaves and catkins.
- http://www.borealforest.org/world/trees/water_birch.htm

Betula occidentalis
- Information on distribution and occurrence, its value and use, characteristics, and fire ecology.
- http://www.fs.fed.us/database/feis/plants/tree/betocc/