To whet your appetite and keep your writing fingers limber, take a good look at the photo, or let a prompt settle in your mind. Set a timer for a reasonable amount of time, be that five, fifteen, or thirty minutes. Then start writing.
This squirrel has an urgent message for you. What is it?
Write about an encounter you've had with a small woodland animal.
Write a blog post or article about local wildlife or write about what people can do if they encounter a wounded animal.