Answer:
The older they are the less wrinkles they have.
Walk on the living, they don't even mumble. Walk on the dead, they mutter and grumble.
What word looks the same upside down and backwards?
My first is a creature whose breeding is unclear. My second, a price you must pay. My whole can be found in the river of Time and refers to events of today.
I have many feathers to help me fly. I have a body and head, but I'm not alive. It is your strength which determines how far I go. You can hold me in your hand, but I'm never thrown.
I will disappear every time you say my name.