Snakes of death

You are the only human on earth. The rest have been killed by the hell creatures-animals that vary in size but don't vary in goal: the death of every creature on earth to call earth their own. You've lived among the shadows for decades, the creatures unaware of your presence. But today you look at their newspapers that you, after a lot of practice can read, and gasp in horror. The newspaper is about a sighting of a human male... and that picture on the newspaper... It's you.