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Photo Info

Dimensions3668 x 2445
Original file size5.16 MB
Image typeJPEG
Color spaceUncalibrated
Date taken9-Jul-12 09:33
Date modified17-Jul-12 21:32
Shooting Conditions

Camera makeCanon
Camera modelCanon EOS-1D Mark IV
Focal length100 mm
Max lens aperturef/2.8
Exposure1/250 at f/22
FlashFired
Exposure bias0 EV
Exposure modeManual
Exposure prog.Manual
ISO speedISO 200
Metering modePattern
Turtle, Black-knobbed Sawback

Turtle, Black-knobbed Sawback

The black-knobbed map turtle (Graptemys nigrinoda), formerly known as the black-knobbed sawback, is a small to medium-sized aquatic turtle with light gray skin. Some of the most distinguishing characteristics of the black-knobbed map turtle, and the Graptemys genus, are the protruding “spikes” on the turtle’s carapace. This species inhabits mainly the fall lines of rivers in the Mobile Bay drainage, in Alabama and Mississippi.