Interesting fact for the day:
“Koalas are mostly nocturnal. Nocturnal animals are awake at night and asleep during the day. Koalas, however, sleep for part of the night and also sometimes move about in the daytime. They often sleep for up to 18-20 hours each day.” Source: Save the Koala
 
Wouldn’t that make them biturnal? Or ambiturnal? [...]