For example, when turtles (hatchlings or adults) are close to the dune, the high shielding angle of the dune combined with the limited vertical angle of view of turtles mean that any sky glow is not likely to be noticed from such locations. From positions closer to the water’s edge, sky glow potentially has a greater influence as the shielding angle of the dune is lower which means sky closer to the luminaires is visible and the region is more likely to be within the upper limits of a turtle’s vertical viewing angle.
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