Deserts are particularly rich in reptiles (snakes and lizards) and rodents (gerbils, jerboas and kangaroo rats), and most of the animals are nocturnal (active at night).
(Deserts; are; particularly rich in reptiles (snakes and lizards) and rodents) (most of the animals; are; nocturnal (active at night)
Deserts most of the animals
are are
particularly rich in reptiles (snakes and lizards) and rodents
nocturnal (active at night