Pick a specific topic for your report. Focus on a certain species, location, or topic such as mammals or birds. The more specific your topic is, the easier it will be to construct your report.
Research your topic. Public and academic libraries are a good place to start. Go to your local zoo and study the animals in person. Use reliable resources on the Internet such as environmental associations' websites.
Organize your research under three or more sub-topics. Each of these sub-topics will be a paragraph in your report. If you are writing a general report on endangered animals good sub-topics include types of animals and reasons for their endangered status.
Write a thesis statement. A thesis statement is a sentence in the first paragraph of your report that summarizes what your report is about. State each sub-topic within your thesis statement and make your position on endangered animals clear.
Write your report. The first paragraph is an introduction and will include your thesis statement. Each paragraph following that will be about one of your sub-topics. The final paragraph should restate your thesis statement in new words. Close your report with your feelings on the issue of endangered animals.