Risso’s dolphins hunt squid over deep offshore water, so the named places attached to this record, Chincoteague and Back Bay national wildlife refuges and the Chesapeake Bay, aren’t real habitat for it; those are shoreline refuges and a shallow estuary, not the open Atlantic canyons this species favors. Confirmed Virginia sightings come from offshore surveys and strandings, not those inland-facing sites.
The occurrence split, just 5 iNaturalist records against 36 from GBIF, is heavily specimen and survey data, the expected pattern for a species almost never photographed from land. Virginia ranks among the rarest states for this species nationally, with only 10 total records against California’s 1,007 and North Carolina’s 90, putting Virginia near the northern edge of where it’s reliably documented on the Atlantic coast.
What sightings exist cluster in August and October, though with barely ten records logged across two decades that’s a thin thread, not a confirmed seasonal pattern.
Full species profile
