Charles knew winter was coming.
All of his friends had flown south weeks ago.
But the berries were SO tasty. He ate and ate and ate.
The snow came, and he was ready to go, but Charles was too heavy to fly.
Tweet Fiction is fiction short enough to fit on Twitter. I am calling it Tweet Fiction, not Twitter Fiction (which is common on Twitter) because I like the name better, and this is Medium. Plus, it sounds better than Micro-Micro-Fiction.
And since this one was about a bird, it is doubly appropriate.