Koala (Phascolarctos cinereus), yawning adult in tree, Australia

adult animal animals australia australian bear bears cinereus day daylight daytime during exterior exteriors fauna in kingdom koala koalas mammal mammalia mammalian mammalians mammals marsupial marsupials metatheria nature nobody one outdoor phascolarctos photo photos separate separately shot shots single singly sit sits sitting tetrapod the tired tiredness tree vertebrata vertebrate vertebrates wild wildlife world yawn yawning yawns