Jim Brandenburg / Red Squirrel (Tamiasciurus hudsonicus) on Red Pine (Pinus resinosa) trunk, Northwoods, Minnesota

Benjamin Olson / Red Squirrel (Tamiasciurus hudsonicus) climbing Northern White Cedar (Thuja occidentalis), Grand Marais, Minnesota

Jim Brandenburg / Red Squirrel (Tamiasciurus hudsonicus), Minnesota

Joel Sartore / Photo Ark / American red squirrel (Tamiasciurus hudsonicus minnesota) portrait, Wildlife Haven and Rehabilitation Centre, Manitoba, Canada. Captive.