Common Snapping Turtle Size and Growth Patterns

The average lifespan of a common snapping turtle in the wild is around 40 to 50 years.

These turtles can grow quite large, with adults typically reaching lengths of 19 to 29 inches and weighing between 10 to 55 pounds.

In ideal conditions, they can live up to 70 years in captivity, but this is less common.

Their growth rate is relatively slow, with hatchlings emerging from eggs after about 80 days of incubation.

The average size of a Snapping Turtle is quite impressive, with a shell length of 8-20 inches and weighing between 8-35 pounds.

Males can grow to be significantly larger than females, with some reaching weights of over 200 pounds, although this is not common for the Alligator Snapper specifically.

The largest wild-caught Snapping Turtle on record weighed 76.5 pounds, although there have been reports of even larger individuals.

Female Snapping Turtles are generally much smaller than males, with the heaviest recorded female weighing just 44 pounds.

The largest Snapping Turtle I've handled tipped the scales at 68 pounds. Its "straight line" carapace length was 18.6 inches.

A record-sized Snapping Turtle from New Hampshire weighed 76.5 pounds and measured 22 inches long. Most record-sized Snappers and Alligator Snappers originate from the northern part of the range.

Of 84,000 Snapping Turtles recorded, only 160 weighed 50 pounds or more. That's a tiny fraction of the total!

All of the 50+ pound Snapping Turtles were males, and the heaviest female on record weighed 44 pounds. Female Alligator Snappers are also substantially smaller than males.

The largest wild-caught individual was a 22 inch-long 76.5 pound behemoth captured in New Hampshire. This is likely due to the fact that most record-sized Snappers and Alligator Snappers originate from the northern part of the range.

The average shell length of a Snapping Turtle is 8-20 inches, and they typically weigh between 8-35 pounds.

For your interest: New England Cottontail Rabbit

Large Urban Snappers can thrive in unexpected places. I've seen them adapt to urban and suburban situations.

In fact, I found two huge males near the Bronx River, on the grounds of the Bronx Zoo. They weighed in at 49 and 45 pounds.

One of the males had an injured jaw and was quite emaciated, but still managed to weigh 49 pounds. I installed him in an outdoor pond near the zoo's Reptile House, where he recovered and "filled out".

Another male, weighing around 45 pounds, was taken to Social Tee's Animal Rescue, a wonderful facility operated by Robert Shapiro. Passersby were amused by the sight of the huge beast on an East Village sidewalk outside the rescue.

Several of the largest animals I've seen were taken from surprisingly small bodies of water on Long Island, NY.