Here are some additional similarities between extinct and endangered species:
* They are both caused by human activities. Most extinctions and endangerments are the result of human actions, such as hunting, habitat destruction, and climate change.
* They can have ripple effects on the ecosystem. The loss of a single species can have a negative impact on other species that rely on it for food or shelter. This can disrupt the entire ecosystem and lead to further extinctions.
* They are both important to protect. All species have a role to play in the ecosystem, and we should do everything we can to prevent them from becoming extinct.