Alligator Snapping Turtle

Alligator Snapping Turtle

Kingdom
Phylum
Subphylum
Class
Order
Suborder
Family
Genus
SPECIES
Macrochelys temminckii
Population size
Unknown
Life Span
20-70 yrs
WEIGHT
8.4-80 kg
LENGTH
35-81 cm

The Alligator snapping turtle is one of the heaviest freshwater turtles in the world. This turtle is given its common name because of its immensely powerful jaws and distinct ridges on its shell that are similar in appearance to the rough, ridged skin of an alligator. Alligator snapping turtles have a large, heavy head, and a long, thick shell with three dorsal ridges of large scales (osteoderms), giving them a primitive appearance reminiscent of some of the plated dinosaurs. The turtles are a solid gray, brown, black, or olive-green in color, and often covered with algae. They have radiating yellow patterns around their eyes, serving to break up the outline of the eyes to keep the turtle camouflaged. Their eyes are also surrounded by a star-shaped arrangement of fleshy, filamentous "eyelashes".

Distribution

Alligator snapping turtles are found primarily in southeastern United States waters. They are found from the Florida Panhandle west to East Texas, north to southeastern Kansas, Missouri, southeastern Iowa, western Illinois, southern Indiana, western Kentucky, and western Tennessee. They are found on the Missouri River at least as far north as the Gavins Point Dam, the southernmost dam on the Missouri River at Yankton, South Dakota, and are featured in the Gavins Point Dam Aquarium. Alligator snapping turtles live rivers, lakes, and canals.

Geography

Continents
Countries

Climate zones

Habits and Lifestyle

Alligator snapping turtles spend most of their lives in water and only nesting females venture onto open land. They are solitary creatures. These turtles most often hunt at night, however, they may also feed during the day. By day, they may try to attract fish and other prey by sitting quietly at the bottom of murky water and let their jaws hang open to reveal their tongues, which look like small, pink, worm-like lures in the back of their gray mouths, and lure the prey into striking distance. Small fish, such as minnows, are often caught in this way by younger Alligator snapping turtles, whereas adults must eat a greater quantity per day and must forage more actively. These turtles are able to stay submerged for 40-50 minutes before surfacing for air and will even hibernate during winter at the bottom of ponds and lakes. When underwater Alligator snapping turtles may stay so motionless that algae can cover their backs and make turtles almost invisible to fish.

Seasonal behavior

Diet and Nutrition

Alligator snapping turtles are almost entirely carnivorous. Their natural diets consist primarily of fish and fish carcasses, mollusks, carrion, and amphibians. They also eat snakes, crayfish, worms, water birds, aquatic plants, other turtles and sometimes even Alligators.

Mating Habits

MATING BEHAVIOR
REPRODUCTION SEASON
spring
PREGNANCY DURATION
100 to 140 days
INCUBATION PERIOD
100-140 days
BABY CARRYING
8 to 52
INDEPENDENT AGE
at birth
FEMALE NAME
female
MALE NAME
male
BABY NAME
hatchling
BABY CARRYING
10-50 eggs

Alligator snapping turtles are polygynandrous (promiscuous) which means that both males and females mate with several partners. Their breeding season takes place yearly, in early spring in the southern part of their total range, and later spring in the north. The female builds a nest and lays a clutch of 10-50 eggs about two months later. The gender of the young depends on the temperature at which the eggs are incubated. Nests are typically excavated at least 50 yards from the water's edge to prevent them from being flooded and drowned. Incubation takes from 100 to 140 days, and hatchlings emerge in the early fall. They are independent at birth and don't need parental care. Young Alligator snapping turtles reach reproductive maturity at around 12 years of age.

Population

Population threats

The main threats to Alligator snapping turtles include collection for the exotic pet trade, overharvesting for their meat, pollution and habitat destruction.

Population number

The IUCN Red List and other sources don’t provide the number of the Alligator snapping turtle total population size. Currently, this species is classified as Vulnerable (VU) on the IUCN Red List.

Ecological niche

Alligator snapping turtles are very important as they are main predators and scavengers in their environment. These turtles help control populations of their main prey species and also help to clean up their habitat feeding on carrion.

References

1. Alligator Snapping Turtle on Wikipedia - https://en.wikipedia.org/wiki/Alligator_snapping_turtle
2. Alligator Snapping Turtle on The IUCN Red List site - https://www.iucnredlist.org/species/12589/97272309

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