![]() The three single cones (saltwater/freshwater crocodile) are violet (424/426 nm λ max), green (502/510 nm λ max) and red (546/554 nm λ max) sensitive, indicating the potential for trichromatic colour vision. ![]() Measurement of the outer segment dimensions and spectral absorbance revealed five distinct photoreceptor types consisting of three single cones, one twin cone and a rod. The saltwater crocodile and freshwater crocodile have a peak spatial resolving power of 8.8 and 8.0 cycles deg −1, respectively. Both species possess a foveal streak that spans the naso-temporal axis and mediates high spatial acuity across the central visual field. Design-based stereology and microspectrophotometry were used to assess spatial resolving power and spectral sensitivity of saltwater ( Crocodylus porosus) and freshwater crocodiles ( Crocodylus johnstoni). ![]() In this study, we examined whether their semi-aquatic lifestyle and ambush hunting mode are reflected in specific adaptations in the peripheral visual system. Crocodilians are apex amphibious predators that occupy a range of tropical habitats. ![]()
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