* Nocturnal animals are active at night, when it is cooler and they are less likely to be seen by predators. They have adaptations that help them see in the dark, such as larger eyes and more rods in their retinas. Some nocturnal animals also have better hearing and sense of smell than diurnal animals.
* Diurnal animals are active during the day, when it is warmer and there is more food available. They have adaptations that help them withstand the heat, such as lighter-colored fur or skin, and the ability to sweat or pant. Diurnal animals also have better vision than nocturnal animals.
High and Low Tides
* Intertidal animals live in the zone between the high and low tide marks. They have adaptations that help them withstand the changing conditions, such as strong shells or bodies, and the ability to breathe air or water. Some intertidal animals also have specialized behaviors, such as the ability to climb or burrow, that help them avoid being washed away by the waves.
* Marine animals live in the ocean, where the tides have less of an impact. They have adaptations that help them swim and float, such as fins or gills. Some marine animals also have specialized behaviors, such as the ability to migrate or dive deep, that help them avoid predators and find food.
Heat
* Desert animals live in hot, dry environments. They have adaptations that help them conserve water, such as storing water in their bodies, excreting concentrated urine, and avoiding activity during the hottest parts of the day. Some desert animals also have specialized behaviors, such as burrowing or hiding in the shade, that help them avoid overheating.
* Arctic animals live in cold, snowy environments. They have adaptations that help them stay warm, such as thick fur or feathers, and the ability to store fat. Some Arctic animals also have specialized behaviors, such as huddling together or building nests, that help them conserve body heat.