Learners explore ruby-throated hummingbirds.  In this cross-curricular hummingbirds lesson plan, students listen to the book The Mystery of the Missing Hummingbirds and choose related topics to research with a partner. Learners draw or write about their topic, then create a realistic model of the hummingbird.  Students weigh their model and add or subtract materials so its weight equals that of a real hummingbird.