Jayden's dichotomous key is a tool that can be used to identify organisms or objects in the natural world, such as plants, animals, or rocks. When talking about birds, Jayden's Dichotomous Key will help classify them by their physical characteristics, like fur, feet, wings, and others. Look at pictures of the four animals. There are many differences, but what are the most obvious features that you could use to tell them apart? The number of legs, for example, is a good place to start. There is more than one right way to do it. Now try writing down your reasoning as a series of questions with two possible answers. They can be yes/no questions, but they do not have to be. Since there are four possible animals, you cannot possibly need more than four questions.