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Every night at 10:00 PM, like clockwork, my frogs crawl into their nighttime hiding spots. They choose the same spot every night and head to that spot at exactly the same time. I'd be less surprised if they didn't "go to bed" before any of their lights start to dim. The lights go out starting at 10:30 and end going out by 11:00 PM. I'm wondering if anyone else has noticed this or has a good explanation for me. There is probably some hormonally regulated system like in people, but I know next to nothing about frog physiology. Anyone have any insight for me?
 

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Mine often seem to have schedules that don't quite correspond with their lighting cycles as well.

-Niels
 

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Darts do have predators. Perhaps they're retiring early because of a leftover instinct to avoid nocturnal predators? Animals that have excellent night vision have very poor color vision, due to many more rods (which detect light) than cones (which detect color) in their eyes. So maybe the frogs are bedding down before the 'sun' goes down so they won't fall prey to animals that can't see their warning colors before it's too late? Just a guess here.
 

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My frogs do that exact thing every night. Its strange though that one of my luecs sleeps alone. While the other two sleep directly ontop of one another in a bromeliad. Very neat to watch though
 
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