Reptiles, unlike mammals, can't regulate their body heat. They become torpid during the cold of the night, and would be easy prey if they didn't hide away. Once the sun has risen and the air has warmed up, so reptiles will become more active.
Since reptiles like lizards, snakes, etc are cold blooded, they spend most of their daytime under sunlight to warm them up. At night, reptiles hide in their houses so that they won't get too cold.
bacterium
They can hide in their predators' blind spots, such as shade.
bacause they want to hide themselves
Reptiles are not pets in the same way that cats and dogs are. Reptiles never accept a human as part of their family - even if they did, reptiles are not social the way most mammals and birds are. An iguana does not want to play with you or socialize with you, so it will hide if it does not want to be picked up or watched.
Butterflies are typically inactive at night and will roost or rest, either hanging upside down from leaves or blending into their surroundings. Some species may hide in vegetation or under rocks to protect themselves from predators and cooler temperatures.
No some hunt their prey at night
To avoid the heat they just repair To the comfort of their underground lair. -They hide under a rock-
I'm not completely sure, but SOME frogs lay there eggs at night, following a specific moon cycle. Others lay the eggs in the day. Personally, laying the eggs at night is a sneakier and smarter way to hide and keep the eggs safe...at least, that's what I think! (:
For work, you could try a clear glass retainer. For parents, it'll be tough to hide it completely.
To hide better at night when they hunt.
Tuatara are not lizards. They are lizard-like reptiles, endemic to New Zealand, but they are not reptiles. Tuatara are relatively defenceless, which is why they have become extinct on the mainland. They hide by day and are active at night, and this is their main means of protection.