Terrapene carolina carolina
Eastern box turtle
Image of Terrapene carolina carolina

Photo by Steve Grund 

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Key Characteristics

The Eastern Box Turtle is a small land turtle with a high-domed carapace (top part of shell) and a hinged plastron (bottom part of shell) which allows it to close its shell tightly and hide its head, legs and tail. The carapace has a slight keel (raised ridge) along the midline and ranges from 5-8 inches (12-20 cm) in length. It is brown or black with a highly variable pattern of yellow or orange markings within each scute (a large scale or plate). The plastron can be yellowish, brown or black and is either plain or marked with blotches or lines. Males are usually larger and more brightly colored than females, often have reddish or pinkish eyes (brown in females) and a concave plastron (flat or slightly convex in females).

Status and Rank

  • State Status: SC
  • State Rank: S2S3
  • Global Rank: G5T5

Occurrences

County NameNumber of OccurrencesYear Last Observed
Allegan262014
Baraga11977
Barry242014
Benzie21981
Berrien342012
Branch11937
Calhoun92012
Cass162009
Clare21994
Eaton12008
Hillsdale11933
Houghton11977
Ingham22004
Ionia62015
Isabella11964
Jackson82008
Kalamazoo332014
Kent192015
Lake102011
Leelanau11979
Lenawee91986
Livingston11998
Manistee102011
Mason92011
Mecosta22003
Monroe32000
Montcalm12015
Muskegon142015
Newaygo92013
Oakland32014
Oceana82013
Ottawa42012
St. Joseph62009
Van Buren182015
Washtenaw62001
Wexford11960
Distribution map for Terrapene carolina carolina

Updated 1/31/2017. Information is summarized from MNFI's database of rare species and community occurrences. Data may not reflect true distribution since much of the state has not been thoroughly surveyed.

Habitat

The Eastern Box Turtle is Michigan's only truly terrestrial turtle. It typically occurs in forested habitats with sandy soils near a source of water such as a stream, pond, lake, marsh or swamp. They also may be found in adjacent thickets, old fields, pastures, or vegetated dunes. Access to unshaded nesting sites in sandy, open areas, is critical for successful reproduction.

Natural Community Types

Methodology

For each species, lists of natural communities were derived from review of the nearly 6,500 element occurrences in the MNFI database, in addition to herbarium label data for some taxa. In most cases, at least one specimen record exists for each listed natural community. For certain taxa, especially poorly collected or extirpated species of prairie and savanna habitats, natural community lists were derived from inferences from collection sites and habitat preferences in immediately adjacent states (particularly Indiana and Illinois). Natural communities are not listed for those species documented only from altered or ruderal habitats in Michigan, especially for taxa that occur in a variety of habitats outside of the state.

Natural communities are not listed in order of frequency of occurrence, but are rather derived from the full set of natural communities, organized by Ecological Group. In many cases, the general habitat descriptions should provide greater clarity and direction to the surveyor. In future versions of the Rare Species Explorer, we hope to incorporate natural community fidelity ranks for each taxon.

Feel free to send questions and comments to Brad Slaughter at slaugh14@msu.edu.

Management

Conservation efforts should concentrate on protecting large tracts of habitat especially on public land to provide the box turtle additional protection from the effects of development. Wetland hydrology and quality should be maintained by preventing improper off-road vehicle use, implementing minimum development set-back distances, leaving buffer zones during timber harvest, grazing and agricultural operations, minimizing use of herbicides and pesticides in or near wetlands, and/or controlling invasive plants. Upland nesting areas should be identified, protected and in some cases created. Construction of new roads should be minimized or routed to avoid separating foraging and/or overwintering habitat from nesting areas. Finally, the public should be educated about the laws protecting reptiles and amphibians and encouraged to leave wild turtles in their natural habitats rather than collecting them for pets.

Active Period

Active from fourth week of April to fourth week of October

Breeding from first week of May to second week of October

Nesting from first week of June to third week of July

Survey Methods

Eastern Box Turtles can be seen anytime during the active season between April and October, although most sightings coincide with nesting or egg laying which occurs from early June through mid-July. Weather is an important factor in determining turtle activity as they often emerge to feed and are often found after a rainstorm. Otherwise, box turtles spend a great deal of time buried under leaf litter, brush piles and rotting logs, especially during hot, dry weather.

Page Citation

Michigan Natural Features Inventory. 2007. Rare Species Explorer (Web Application). Available online at http://mnfi.anr.msu.edu/explorer [Accessed Mar 25, 2017]

More Information

See MNFI Species Abstract

References

Survey References

Technical References