Biodiversity is all the different animals and plants that live in a certain habitat. This Mystery is a case study in biodiversity using the frogs of North America. In the activity, Who's Calling?, students learn to identify frogs by their unique calls and investigate which of two locations has a greater variety of frogs. 1. Watch the video that is attached to the link 2. Watch the activity section of the video and follow the direction that Doug give you. 3. Complete the attached form .