Description: The bog turtle is the smallest species of turtle in North America. The adults weigh approximately 3.9 ounces when fully grown. It does not have a prominent snout. Its head is dark brown to black; however, it has a bright yellow, orange, or red spot on each side of its neck. The spot is often forked, facing posteriorly. The bog turtle has a dark skin color with an orange-red wash on the inside of the legs of some individuals. The carapace is domed and rectangular in shape, and it tends to be narrower toward the head and wider toward the tail. The carapace often has easily identifiable rings on the rough scales or scutes. The scutes may also have a radiating arrangement of lines. In some older individuals, and those that burrow frequently in coarse substrates, the shell may be smooth. Although generally black, a chestnut sunburst pattern in each scute is sometimes present on the carapace. The belly of the shell, the plastron, is also a dark brown to black color with light marks present.

The spotted turtle and painted turtle are similar in appearance to the bog turtle. The bog turtle is distinguishable from any other species of turtle by the distinctively colored blotch on its neck. A major difference between it and the spotted turtle is that the bog turtle has no coloration on the upper shell, unlike the latter species.

Mature male bog turtles have an average length of 3.7 inches while the average female length is 3.5 inches (straight carapace measurement). The males have a larger average body size than females, likely to facilitate males during male–male interactions during mate selection. The female has a wider and higher shell than the male, but the male's head is squared and larger than a female's of the same age. The plastron of the male looks slightly concave while the female's is flat. The male's tail is longer and thicker than the female's. The cloaca is further towards the end of the tail of the male bog turtle, while the female's cloaca is positioned inside the plastron. Juveniles are very difficult to sex.

Habitat: Rushes, tussock sedge, cattails, jewelweed, sphagnum, and various native true grasses are found in the bog turtle's habitat, as well as some shrubs and trees such as willows, red maples, and alders.

Range: The bog turtle can be found from Vermont in the north, south to Georgia, and west to Ohio.

Found in these States: CT | DE | GA | MA | MD | NC | NJ | NY | PA | SC | TN | VA

Diet: Bog turtles are omnivorous and eat aquatic plants (such as duckweed), seeds, berries, earthworms, snails, slugs, insects, other invertebrates, frogs, and other small vertebrates. They also occasionally eat carrion. Invertebrates such as insects are generally the most important food item. In captivity, a bog turtle can be fed a variety of fruits and vegetables, as well as meat such as liver, chicken hearts, and tinned dog food. Bog turtles feed only during the day, but rarely during the hottest hours, consuming their food on land or in the water.

Reproduction: They mate in the spring after emerging from hibernation, in a copulation session that usually lasts for 5–20 minutes, typically during the afternoon, and may occur on land or in the water. It begins with the male recognizing the female's sex. During the courtship ritual, the male gently bites and nudges the female's head. Younger males tend to be more aggressive during copulation, and females sometimes try to avoid an over-aggressive male. However, as the female ages, she is more likely to accept the aggressiveness of a male, and may even take the role of initiator. If the female yields, she may withdraw her front limbs and head. After the entire process is over, which usually takes about 35 minutes, male and female go separate ways. In a single season, females may mate once, twice, or not at all, and males try to mate as many times as possible. It has been suggested that it is possible for the bog turtle to hybridize with Clemmys guttata during the mating season. However, it has not been genetically verified in wild populations.

Nesting takes place between April and July. The female digs a cavity in a dry, sunny area of a bog, and lays her eggs in a grass tussock or on sphagnum moss. The nest is typically 1.5 to 2.0 inches deep and 2.0 inches around. Like most species of turtle, the bog turtle constructs its nest using its hind feet and claws. Most bog turtle eggs are laid in June. Pregnant females lay one to six eggs per clutch (mean of 3), and produce one clutch per year. A healthy female bog turtle can lay between 30 and 45 eggs in her lifetime, but many of the offspring do not survive to reach sexual maturity. Typically, older females lay more eggs than younger ones. The eggs are white, elliptical, and on average 1.3 inches long and 0.59 inches wide. After the eggs are laid, they are left to undergo an incubation period that lasts for 42 to 80 days. In colder climates, the eggs are incubated through the winter and hatch in the spring. The eggs are vulnerable during the incubation period, and often fall prey to mammals and birds. In addition, eggs may be jeopardized by flooding, frost, or various developmental problems. It is unknown how gender is determined in bog turtles.

Baby bog turtles are about 0.98 inches long when they emerge from their eggs, usually in late August or September. Females are slightly smaller at birth, and tend to grow more slowly than males. Both genders grow rapidly until they reach maturity. Juveniles almost double in size in their first four years, but do not become fully grown until five or six years old.

Status: Protected under the United States Federal Endangered Species Act, the bog turtle is considered threatened in Connecticut, Delaware, Maryland, Massachusetts, New Jersey, New York and Pennsylvania as of November 4, 1997. Due to a "similarity of appearance" to the northern population, the bog turtle is also threatened in Georgia, North Carolina, South Carolina, Tennessee and Virginia (considered to be the southern population). In addition to the federal listing of threatened, states in the southern range list the bog turtle as either endangered or threatened. Changes to the bog turtle's habitat have resulted in the disappearance of 80 percent of the colonies that existed 30 years ago. Because of the turtle's rarity, it is also in danger of illegal collection, often for the worldwide pet trade. Despite regulations prohibiting their collection, barter, or export, bog turtles are commonly taken by poachers. Road traffic has also led to declines. The U.S. Fish and Wildlife Service has a plan for the recovery of the northern population. The bog turtle was listed as critically endangered in the 2011 IUCN Red List.

Subspecies: None

Taxonomy: