Illinois Natural History Survey - University of Illinois

Emydoidea blandingii (Holbrook, 1838) -- Blanding's Turtle

All information found on this site falls under the INHS's Internet License Agreement.

EblandWill.jpg EblandWillHead.JPG Emydoidea_blandingii_LeeCo_2014.jpg
Will Co., IL photo by C.A. Phillips Will Co., IL photo by C.A. Phillips Lee Co., IL photo by A.R. Kuhns


Key Characters: Bright yellow chin and throat; notched upper jaw; hinged plastron.

Similar species: Box turtles, Spotted Turtle. See Key to Illinois Turtles for help with identification.

Subspecies: None recognized.

Description: Medium-sized (up to 24 cm CL) turtle with dark shell. Head and carapace profusely decked with light spots and dashes. Each plastral scute patterned with a large dark blotch usually bordered with yellow but, in older individuals, entire plastron may be black. Pleural scutes of young unpatterned or have faint radiating streaks. Disproportionately longer tail than box turtles. Male with concave plastron, heavier tail with cloacal opening behind edge of carapace, and dark markings on upper mandible.

Habitat: Quiet waters in marshes, prairie wetlands, wet sedge meadows, and shallow, vegetated portions of lakes.

Natural History: Usually found in and around water, but moves long distances overland. Long-lived, up to 77 years. Chiefly carnivorous, eating snails, insects, crayfish, and vertebrates. Female nests in late May and June, laying one clutch of about 12 hard-shelled, ellipsoidal eggs (ca. 30 x 20 mm).

Status: State endangered. Major threat has been habitat destruction. Relatively common in appropriate habitat from Illinois River northward. Rare farther south.

Etymology: Emydoidea - emydo (Greek) for ‘freshwater tortoise’; eidos (Greek) for form, resemblance; blandingii - (New Latin) in honor of Dr. William Blanding (1772-1857)

Original Description: Holbrook, J.E. 1838. North American Herpetology. Ed. 1. Vol. 3. J. Dobson and Son, Philadelphia. 3:122 pp.

Type Specimen: Holotype, ANSP 26123

Type Locality: "Fox river, a tributary of the Illinois"

Original Name: Cistuda blandingii Holbrook, 1838

Nomenclatural History: The names Testudo flava Lacepede, 1788 and Testudo meleagris Shaw, 1793 were suppressed by the ICZN based on petition by Mertens & Wermuth (1961), but Loveridge & Williams (1957) held the contrary opinion that those names should be referred to the synonomy of the European species Emys orbicularis. The Blanding's Turtle has been referred to as Cistudo blandingii and Emys blandingii in the Illinois literature.

Illinois Natural History Survey

1816 South Oak Street, MC 652
Champaign, IL 61820

Terms of use. Email the Web Administrator with questions or comments.

© 2021 University of Illinois Board of Trustees. All rights reserved.
For permissions information, contact the Illinois Natural History Survey.

Staff Intranet