From Mongolian folklore comes this helpful little fable of the boastful frog.
Two geese were about to start southward on their annual autumn migration, when they were entreated by a frog to take him with them. On the geese expressing their willingness to do so if a means of conveyance could be devised, the frog produced a long stalk of grass, got the two geese to take it one by each end, while he clung to it by his mouth in the middle. In this manner the three were making their journey when they were noticed from below by some men.
The men loudly expressed their admiration for the device and wondered who had been cleaver enough to discover it. Whereupon the vainglorious frog opened his mouth to say, "It was I," lost his hold, fell to the earth, and was dashed to pieces.
Moral: When you have a good thing going, keep your mouth shut!