If we don’t act soon, species like the African penguin, longcomb sawfish, green sea turtle and southern sea otter could be on the brink of extinction. These creatures face a litany of threats, many of which are directly related to humans. That means humans can help fix the problems we’re causing. We’ve seen how changing our behavior can have a powerful effect with the conservation of endangered species such as the American alligator.

Below you’ll find four creatures on the brink of drastically low numbers. You’ll see what threatens them and why their survival matters to the ecosystems in which they live. We can help save these creatures. We’ve done it before.