Black-knobbed Map Turtle Graptemys nigrinoda

Black-knobbed Map Turtle
Black-knobbed Map Terrapin
The Black-knobbed Map Terrapin (called Turtle in America) is native to rivers of Mobile Bay in southern Alabama and Mississippi, on the US Gulf Coast.
Black-knobbed Map Turtle
Black-knobbed Map Terrapin
The Black-knobbed Turtle is named after the four knobs (backward protruding vertebrae) on its back. Like several other American terrapins, the head, body, tail and legs have distinguishing patterns of yellow stripes.
Black-knobbed Map Turtle
Black-knobbed Map Terrapin
Black-knobbed Map Turtle
The knobs reduce with age. Females are much larger than males. Female and juvenile are shown above.
Black-knobbed Map Turtle
Black-knobbed Map Terrapin
Black-knobbed Map Turtle
Threats include habitat disturbance (by humans) and predation of eggs by fish, crows, raccoons and armadillos.
Black-knobbed Map Turtle
Black-knobbed Map Terrapin
Black-knobbed Map Turtle