See also: Tortoise in Pictorial Dictionary of Heraldry.
A long-lived, slow-moving animal protected by a hard shell. Also blazoned a “turtle.”
Default posture: tergiant. No proper coloration.
Tortoise (1) §
Source: Pennsic Traceable Art. Artist unknown.
Tortoise (2) §
Source: Guillim’s Display of Heraldry. Artist unknown.