Red-eared sliders (Trachemys scripta elegans) are freshwater turtles native to the Mississippi River basin in the United States. They have been introduced to many other parts of the world, including California, and have become a major threat to native turtle species.

Red-eared sliders are larger and more aggressive than native California turtles, and they compete with them for food and habitat. They also carry diseases that can be fatal to native turtles. In addition, red-eared sliders can hybridize with native turtles, which can lead to the loss of genetic diversity.

One of the native turtle species that is most threatened by red-eared sliders is the western pond turtle (Actinemys marmorata). Western pond turtles are found in ponds, streams, and rivers in California and Oregon, and they are considered to be a threatened species. Red-eared sliders compete with western pond turtles for food and habitat, and they also carry a disease that can be fatal to western pond turtles.

Another native turtle species that is threatened by red-eared sliders is the southwestern pond turtle (Actinemys pallida). Southwestern pond turtles are found in ponds and streams in southern California and Arizona, and they are considered to be a critically endangered species. Red-eared sliders compete with southwestern pond turtles for food and habitat, and they also carry a disease that can be fatal to southwestern pond turtles.

The introduction of red-eared sliders into California has had a devastating impact on native turtle populations. Red-eared sliders are a major threat to the survival of western pond turtles and southwestern pond turtles, and they are also a threat to other native turtle species.

Here are some things that can be done to help protect native turtles from red-eared sliders:

* Don't release pet red-eared sliders into the wild. This is the most important thing you can do to help protect native turtles. Red-eared sliders are a harmful invasive species, and they should never be released into the wild.

* Report sightings of red-eared sliders to your local wildlife agency. This will help wildlife officials track the spread of red-eared sliders and take steps to control their population.

* Support organizations that are working to protect native turtles. There are many organizations that are working to protect native turtles from red-eared sliders and other threats. You can support these organizations by donating money, volunteering your time, or spreading the word about their work.

By working together, we can help protect native turtles from the threat of red-eared sliders and ensure their survival for future generations.