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Turtles are ancient, cold-blooded reptiles belonging to the order Testudines, easily distinguished by their unique bony or cartilaginous shell that develops from their ribs and acts as a protective shield. They are among the oldest reptile groups on Earth, having evolved over 200 million years ago, meaning they shared the planet with early dinosaurs. Turtles are incredibly diverse and adaptable, with species inhabiting every continent except Antarctica and surviving in a vast range of environments—from the depths of the world’s oceans to arid deserts and lush freshwater marshes. While the term “turtle” is often used broadly, it technically encompasses strictly aquatic species, land-dwelling tortoises, and semi-aquatic terrapins, all of which breathe air and lay their eggs on land.

From an ecological standpoint, turtles exist as vital “keystone species” that maintain the health and balance of their respective ecosystems. In marine environments, sea turtles like the green sea turtle graze on seagrass beds, keeping them short and healthy, which in turn provides a crucial nursery habitat for many species of fish and invertebrates. On land and in freshwater, turtles act as nature’s clean-up crew by scavenging dead organic matter, while also serving as seed dispersers for various plants and population controllers for insects, jellyfish, and mollusks. Their long evolutionary history is a testament to an incredibly successful biological design; they fill specific, irreplaceable niches in the food web, and their absence would cause a damaging ripple effect throughout global ecosystems.

To answer how turtles are currently faring, the unfortunate reality is that they are facing unprecedented crises, with more than half of all turtle and tortoise species currently threatened with extinction. Human activities are the primary drivers of this decline, including habitat destruction, coastal development that ruins nesting beaches, pollution (particularly plastic waste in oceans), and the illegal pet trade and poaching. Additionally, climate change poses a unique threat to their reproduction: because the sex of turtle hatchlings is determined by egg incubation temperature, rising global temperatures are causing a severe gender imbalance, producing far more females than males. However, it is not entirely a story of doom; global conservation efforts, protected marine sanctuaries, and community-led beach patrols are actively fighting to give these resilient creatures a chance at survival.