Answer:
Has feathers but can't fly. Rests on legs but can't walk.
Talks like this, a green wise man does. Guess my clue, you will.
My first keeps time, my second spends time, my whole tells time.
A time when they're green. A time when they're brown. But both of these times, cause me to frown. But just in between, for a very short while. They're perfect and yellow. And cause me to smile.
What is full of holes, but can still hold a lot of water?
I am your mother's brother's only brother in law. Who am I?