Animals do not think about death. A butterfly has a short life, yet it goes about its life not knowing what a limited time it has. Animals live in the moment. Humans live their lives being shaped by the past or by the future. If we could only live in the now, our minds full of this moment. Some long for the past, others for the future. Only the wise are content with the now.
In the cicada's cry
There's no sign that can foretell
How soon it must die.