It’s the middle of the night and you’re in bed, sound asleep. Outside though, there’s a whole world of activity! Some animals’ days only begin when the Sun goes down.
There are a few really good reasons for this. If all animals were active during the daylight, the world would be a lot more crowded. With some of the animals taking the night shift, there is less competition for food, water, and space.
The nightlife also helps some animals escape predators that would hunt them during the day. Some predators, like owls and wolves, have adapted to nighttime hunting, so animals are not totally safe.
In very hot parts of the world, a nocturnal life makes sense because it’s much cooler at night than it is when the Sun is shining. Most animals don’t have air conditioning like people do, so avoiding the Sun really helps.