Lots of Queensland's most interesting creatures can only be heard at night. Other animals are active during the day, but join in the after-hours racket for particular reasons. The noises they make can tell you lots about their habits, hang-ups and lovelife.
Animals get noisy after dark for many reasons.
It could be because It's their day. For nocturnal animals, life happens at night. It's their patch. They're defending territory from nocturnal marauders. They've been disturbed by bright moonlight.