If there is any evidence that the Bible is a fable, or contains fables, then the presence of talking animals would certainly be a part of such evidence.
The story of the temptation of Eve, right at the beginning of the bible, is the cornerstone of Jewish, Christian, and Moslem theology. Without it, there is no need for salvation. It is clearly a "moral tale," and it contains a talking animal.
Genesis3:1 ~ Now the serpent was more crafty than any of the wild animals the LORD God had made. He said to the woman, "Did God really say, 'You must not eat from any tree in the garden'?"
The Bible also mentions an ass that didn't know when to stop talking.
Numbers. 22:30 ~ The donkey said to Balaam, "Am I not your own donkey, which you have always ridden, to this day? Have I been in the habit of doing this to you?"
The Bible describes more talking animals.
Revelation 4:8 ~ Each of the four living creatures had six wings and was covered with eyes all around, even under his wings. Day and night they never stop saying: "Holy, holy, holy is the Lord God Almighty, who was, and is, and is to come."
The Bible also vividly describes satan as a talking animal.
Revelation 13:11 ~ Then I saw another beast, coming out of the earth. He had two horns like a lamb, but he spoke like a dragon. 15. He was given power to give breath to the image of the first beast, so that it could speak and cause all who refused to worship the image to be killed.
The Bible contains moral tales that involve speaking animals. Therefore, the Bible is a fable.
"You believe in a book that has talking animals, wizards, witches, demons, sticks turning into snakes, burning bushes, food falling from the sky, people walking on water, and all sorts of magical, absurd and primitive stories, and you say we are the ones that need help?"--Mark Twain
1. a short tale to teach a moral lesson, often with animals or inanimate objects as characters
a story not founded on fact
a story about supernatural or extraordinary persons or incidents
"What profit has not that fable of Christ brought us!" Pope Leo X.