Squamata suborder Serpentes
Thamnophis proximus -- Western Ribbonsnake
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Squamata suborder Serpentes
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Search for another IL amphibian or reptile Search for IL amphibians & reptiles by county Go to the INHS Amphibian & Reptile Collection homepage Search the INHS collections data for amphibians & reptiles Search the INHS Type Specimen Data for amphibians & reptiles |  
Purple shade indicates vouchered specimens. Light blue (cyan)
shade indicates photographic records. Yellow shade indicates verified
sighting. |
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Key Characteristics: Side stripe on scale rows 3-4; orange midback stripe; pair of light spots on top of the head; back scales keeled; anal plate not divided. Similar Species: Eastern ribbonsnake, common gartersnake, plains gartersnake. Subspecies: Western ribbonsnake, T. p. proximus. Description: Medium-sized (up to 90 cm TL), slender black snake with an orange midback stripe and yellow or greenish stripes on each side. Belly greenish white. Tail about one-third of body length. Paired spots on top of head relatively large and partially fused. Usually 8 supralabial scales. Habitat: Border vegetation around permanent bodies of water (swamps, marshes, ponds, rivers, ditches) and along bases of nearby rock outcrops where some individuals hibernate. Climbs onto piles of plants and low bushes. Natural History: A quick, wary snake that climbs and swims readily. Bites when handled. Mates in April or May and gives birth to 10-15 young from July into October that are 15-20 cm TL. Diet mainly of fish and amphibians, especially frogs, and occasionally includes small reptiles. Among its predators are large shore birds, medium-sized mammals, and other snakes. Hibernates in rock crevices and burrows. Status: Locally common along the Mississippi River valley and in southwestern counties, where cultivation and drainage of wetlands are major threats (see distribution map, above). |
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