Five basic criteria are used to determine if a species is threatened or endangered.
Where do the endangered green sea turtles spend their early years?
We’ve discussed before how endangered species are at risk from the increased likelihood of inbreeding, which leads to unhealthy offspring. There’s another danger to letting the numbers of animals in a given species become too low. It’s called genetic drift. Learn more on this Moment of Science.
Inbreeding is the term used when animals mate with their relatives. Learn more on this Moment of Science.
Bald eagles are not longer an endangered species. Learn more on this Moment of Science.
The Leatherback turtle is special because of its ability, unlike other sea turtles, to survive in cold waters.