Many diurnal (active during the day) frog species have retained genes adapted for night vision. This may seem counterintuitive, as these species primarily use their vision during the day. However, there are several reasons why diurnal frogs might still benefit from having night vision genes.

Cryptic coloration: Many diurnal frogs rely on camouflage to avoid predators and capture prey. Having night vision genes can help these frogs to better detect predators and prey in low-light conditions, such as at dawn and dusk.

Dim light conditions: Even during the day, there are often times when light levels are low, such as in dense forests or under thick vegetation. Night vision genes can help frogs to see better in these conditions, giving them an advantage over other animals that are not as well-adapted to low light.

Increased visual acuity: Night vision genes can help frogs to see more clearly and in more detail, even in bright light conditions. This can give them an advantage in detecting predators and prey, as well as in navigating their environment.

Adaptations to different light conditions: Some diurnal frog species may have evolved night vision genes as a way to adapt to different light conditions. For example, some species may be more active at dawn and dusk, when light levels are lower. Having night vision genes can help these species to be more active during these times, giving them a competitive advantage over other species that are not as well-adapted to low light.