Answer:
It is the assumed nocturnal symbol of Mr. Wayne. What is it?
A mile from end to end, yet as close to as a friend. A precious commodity, freely given. Seen on the dead and on the living. Found on the rich, poor, short and tall, but shared among children most of all.
There are millions of me. I am very small but when moving fast I am deadly.
My life can be measured in hours, I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe.
As I walked along the path I saw something with four fingers and one thumb, but it was not flesh, fish, bone or fowl.
I have two eyes in the front and a lot of eyes on my tail