If a local sighting survey shows a sudden increase in black squirrels where only grays were historically noted, what might this imply about the past?

Answer

A correlation with known records of translocations

A sudden, localized cluster of black sightings often suggests a historical introduction, either accidental or deliberate, or a rapid shift in the local reproductive pool.

If a local sighting survey shows a sudden increase in black squirrels where only grays were historically noted, what might this imply about the past?
colorvariationsquirrelMelanismeastern gray squirrel