Snapping turtles are ancient reptiles recognized for their distinctive appearance and powerful jaws. These aquatic creatures are widespread across North America, inhabiting various freshwater environments. Their robust build and ability to reach considerable sizes contribute to their reputation.
Common Snapping Turtle Dimensions
The Common Snapping Turtle (Chelydra serpentina) is a widespread freshwater turtle with a rugged, muscular build. Adults typically have a straight-line carapace (upper shell) length ranging from 25 to 47 cm (9.8 to 18.5 inches), though it can reach nearly 50 cm (20 inches). These turtles usually weigh between 4.5 and 16 kg (9.9 to 35.3 pounds).
Male common snapping turtles generally grow larger than females, with many males exceeding 10 kg (22 lb) as they age. While exceptional, wild specimens have been reported to weigh up to 34 kg (75 lb). Captive common snapping turtles, if overfed, can become quite heavy, with some reaching 39 kg (86 lb).
Alligator Snapping Turtle Dimensions
The Alligator Snapping Turtle (Macrochelys temminckii) is the largest freshwater turtle in North America, often distinguished by its prehistoric appearance. Adults typically have a carapace length between 56 and 74 cm (22 and 29 inches) and weigh from 80 to 114 kg (176 to 251 pounds). Males are significantly larger than females.
Record-breaking specimens have been reported, including one that weighed 113 kg (249 lb) at the Shedd Aquarium. Unverified reports suggest some individuals have reached over 183 kg (403 lb).
Factors Influencing Snapping Turtle Size
A snapping turtle’s ultimate size is influenced by a combination of biological and environmental factors. Snapping turtles exhibit indeterminate growth, meaning they continue to grow throughout their lives, although the growth rate slows considerably with age. Longevity plays a role, with some common snapping turtles living over 100 years in the wild, and alligator snapping turtles potentially living even longer.
Diet quality and availability significantly affect growth. Snapping turtles are omnivores, consuming a wide range of prey including fish, insects, amphibians, and aquatic plants. A consistent and nutrient-rich diet, particularly high in protein, is important for growth, though overfeeding can lead to obesity in captivity.
Habitat conditions also impact size. Suitable habitats with ample space, clean water, and appropriate temperatures are important for healthy development. As reptiles, their metabolism and growth are influenced by environmental temperature.