Mammals of Boston National Historical Park
The mammals most often spotted in Boston, ranked by recent research-grade observations.
Naturalists have logged 1,959 research-grade observations across the 22 most-recorded species in Boston. The most frequently seen is the Eastern Gray Squirrel, with 1,441 recorded sightings.
Most-observed mammals in Boston
Built from recent research-grade iNaturalist observations. Identifications are community-sourced and may occasionally be wrong, and the ranking reflects where people record and photograph wildlife, so a species seen often here is not necessarily rare elsewhere. Some plants and animals are only out in certain seasons. Treat this as a lively snapshot of what people are finding, not a formal checklist.
Mammals in nearby places
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