a koala bear sleeps soundly in a eucalyptus tree, its fur soft and gray against the green foliage

koala bear eucalyptus tree sleep fur gray green foliage animal wildlife nature cute cuddly adorable marsupial australia mammal portrait fauna zoology conservation endangered environment welfare habitat rainforest forest jungle bush outback sunshine sun sunlight shadow light closeup macro close sleepy resting relaxing peaceful tranquility calm sleeps soundly soft