During a visit to the Sequoyah National Wildlife Refuge in Oklahoma, I had the opportunity to photograph an intriguing turtle species. After some research, I identified it as an Ouachita Map Turtle. The turtle was basking on a log in the Arkansas River, west of the Tuff Boat Ramp, creating a perfect moment for a photograph.
Identifying the Ouachita Map Turtle
Ouachita Map Turtles are named for the distinctive patterns on their shells, resembling the contours of a map. What sets this species apart from other map turtles are the three large blotches on each side of its head:
- Behind the Eye: A prominent blotch located directly behind the eye.
- Below the Eye: Another blotch just beneath the eye.
- Below the Line of the Mouth: A third blotch under the mouth line.
These distinguishing features help differentiate the Ouachita Map Turtle from the similar-looking False Map Turtle, which has a thick yellow line behind each eye forming a backward “L” shape.
Observing Basking Behavior
Like many turtles, Ouachita Map Turtles spend much of their day basking in the sun, often on logs or rocks that extend far from the shore. Basking helps regulate their body temperature and allows them to absorb ultraviolet light, which is essential for shell health. However, these turtles are extremely cautious while basking and will quickly retreat into the water at the first sign of disturbance.
To capture this shot, I took a low-profile approach, parking my vehicle on the side of the tour road. Using the car as a blind allowed me to photograph the turtle from a distance without causing any alarm. This approach is especially useful when photographing wildlife that is sensitive to human presence.
Camera Settings and Technique
For this shot, I used my Fujifilm X-T3 with a Canon EF 100-400mm f/4.5-5.6L IS II lens attached via a Fringer EF-FX Pro adapter. Here were the specific settings:
- Shooting Mode: Aperture Priority (AV)
- Shutter Speed: 1/680 sec
- Aperture: f/8
- ISO: 800
- Exposure Compensation: +0.3 EV
The aperture of f/8 provided a balance between depth of field and sharpness, ensuring the turtle and its reflection in the water were both in focus. The shutter speed of 1/680 sec was fast enough to capture the scene sharply, while the ISO of 800 maintained a good exposure in the available light. The +0.3 exposure compensation brightened the image slightly, helping to bring out the details in the turtle’s shell and head.
Tips for Photographing Turtles
- Approach Slowly and Quietly: Turtles are highly sensitive to disturbances. Use a vehicle or natural cover to get closer without startling them.
- Use a Telephoto Lens: A lens with at least 300mm reach allows you to photograph turtles from a safe distance while still capturing details.
- Watch the Lighting: Early morning or late afternoon light provides soft illumination that can enhance the textures and colors of the turtle’s shell.
- Incorporate Reflections: If the turtle is basking near water, try to include its reflection in the composition for added visual interest.
The Importance of Respecting Wildlife
Observing and photographing species like the Ouachita Map Turtle is a privilege that comes with a responsibility to respect their natural behaviors and habitat. When photographing wildlife, it is essential to minimize disturbances, maintain a safe distance, and use ethical practices to ensure that the animals are not stressed or harmed. By taking these precautions, we can capture beautiful images while also helping to preserve the delicate ecosystems that these creatures call home.
Sequoyah National Wildlife Refuge is a sanctuary for various species, making it a perfect place for wildlife enthusiasts to appreciate the diversity of nature. Encounters like this remind us of the beauty and intricacy of the natural world, inspiring us to protect it for future generations.
The Role of Turtles in Ecosystems
Turtles play a vital role in aquatic ecosystems by helping to maintain healthy water bodies. They contribute to controlling aquatic vegetation and can act as indicators of a waterway’s health. Monitoring their populations can provide valuable insights into environmental changes.
Photographing this Ouachita Map Turtle basking on the log not only allowed me to appreciate its beauty but also served as a reminder of the important roles that these reptiles play in maintaining the balance of their habitats.