Animals which are active during night and sleep during the day are called .

Animals which are active during night and sleep during the day are called nocturnals. E.g., cats, rats, bats, owls, etc. These creatures generally have:
$\bullet$ Highly developed senses of hearing and smell.
$\bullet$ They have specially adapted eye sight to see well in dark.
$\bullet$ Can emit high pitched sounds to find prey or protect themselves from predators. E.g., Bats.