Answer:
I'm a bird that can repeat the words you say. What am I?
A darkΒ-colored creature serenaded by Lennon and McCartney.
A spent round or a slimy critter.
What is green, has four legs, no tail, and usually heard at night?
Though desert men once called me God, today men call me mad. For I wag my tail when I am angry. And growl when I am glad.
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.