Critical Thinking Extension: Here are some ideas for discussion in class after the lesson. 

• What are some other endangered species you know about? How many non-mammals can you list? How many invertebrates? What about plants? What kinds of bias might we have in deciding how much to value one biological species over another? 
• Can you think of other examples of conflict between humans and some wildlife species? You can browse this collection for some ideas. What are possible solutions in such situations? What would make a solution succeed in the long-term?