Oregon’s introduced black-rat records lean toward the mild, densely settled west side, including the Willamette Valley, lower river corridors, and coastal communities. October and November stand above the otherwise modest year-round series, while midsummer has comparatively few reports. Because commensal rodents are reported unevenly and often only when noticed around people, these records are detections, not an abundance estimate.
Full species profile
Data & sources
The data and visualizations on this page draw on these open sources:
- GBIFCC-BY 4.0occurrence records behind the range map, elevation, and record counts
- iNaturalistCC0 / CC-BY / CC-BY-SAobservations, photos, and audio recordings
- NatureServe ExplorerCC-BYthe state conservation rank
- IUCN Red Listattributed factthe global conservation status
- USGS NASpublic domainnative / introduced status
- Natural Earthpublic domainthe relief basemap
- USFSpublic domainnational-forest boundaries
- USGS Protected Areas Databasepublic domainthe named parks, forests, and refuges behind "notable places to look"
