Here is a quick video to refresh everyone's memory on how to use a dichotomous key. Mark Drollinger gives us a very good example of how it can be confusing to categorize something such as birds. Remember when using a dichotomous key always start at the top and never skip ahead. These take time and patience but if they are executed properly you can always succeed.
You can use Creately dichotomous key maker to create dichotomous keys online. There are templates and examples to get started as well.
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