This page lists all the documents used to compile these tables. The symbols and numbers quoted on this page refer to any reference symbol or number in any of the microbiogeography of Colorado pages.

* Indicates that, while the species has not been documented for the county, it may occur there (Reichard et al. 1996).
# Indicates that, while at least one of the subspecies has not been documented for the county, two possible subspecies of the same species may occur in the county.
H Hammerson, G. A. 1986. Amphibians and Reptiles in Colorado. Colorado Division of Wildlife, Publ. No. DOW-M-1-3-86 131 pp.
H2 Hammerson, G. A., and H. M. Smith. In press. Amphibians and reptiles in Colorado. 2nd ed.
Note 1 A specimen of this complex has been reported from Bent County, but its specific identity is unknown.
Note 2 Although S. multiplicata is expected in this county, this specimen was re-identified as Spea bombifrons by G. A. Hammerson, pers. comm., 3/1998.
Note 3 The validity of Acris crepitans records in Morgan County is uncertain.
Note 4 The validity of Acris crepitans records in Weld County is uncertain.
Note 5 Although Holbrookia maculata is expected to occur in Boulder County, this record is considered that of an introduced specimen.
Note 6 An introduced population of this taxon apparently is present in the vicinity of Hotchkiss.
Note 7 Specimens of C. picta in Mesa County represent introduced individuals.
Note 8 The specimen reported in this note probably represents an introduced individual.
UC1 University of Colorado Museum, specimen number 58796.
An1 Anonymous. 1990. Snapping turtle roams Crown Hill. 1990. Lakewood/Jefferson Sentinal Newspaper, July 19. (Article shows photo of snapping turtle. In addition, other people have mentioned seeing snapping turtles at Crown Hill Open Space.)
AA1 J. A. Applegarth, pers. comm.
KGA1 Ashton, K. G. 1998. Geographic distribution: Spea multiplicata. Herp. Rev. 29(2):108.
EB1 Bergman, E., S. Boback, B. Hill, J. Hobert, C. Montgomery, and S. P. Mackessy. 1996. Geographic distribution: Pseudacris triseriata maculata. Herp. Rev. 27(4):209.
EB2 Bergman, E., B. Hill, C. Montgomery, J. Hobert, S. Boback, and S. P. Mackessy. 1997. Geographic distribution: Chrysemys picta belli. Herp. Rev. 28(1):49.
EB3 Bergman, E., B. Hill, C. Montgomery, J. Hobert, S. Boback, and S. P. Mackessy. Geographic distribution: Tropidoclonion lineatum lineatum. Herp. Rev. 28(1):53.
EB4 Bergman, E., B. Hill, C. Montgomery, T. Childers, J. D. Manzer, J. Sifert, and S. P. Mackessy. 1998. Geographic distribution: Phrynosoma douglassii. Herp. Rev. 29(2):111.
EB5 Bergman, E., M. Bergman, T. Childers, J. D. Manzer, and S. P. Mackessy. 1998. Geographic distribution: Arizona elegans elegans. Herp. Rev. 29(4):248-249.
EB6 Bergman, E., J. D. Manzer, T. Childers, and S. P. Mackessy. 1998. Geographic distribution: Kinosternon flavescens flavescens. Herp. Rev. 29(4):247.
EB7 Bergman, E., C. Montgomery, T. Childers, J. D. Manzer, J. Sifert, B. Hill, and S. P. Mackessy. Submitted. Geographic distribution: Lampropeltis getulus holbrooki/splendida. Herp. Rev.
FB1 Blanchard, F. , T. Arneill, L. Czupryna, D. Chiszar, and H. M. Smith. 1997. Geographic distribution: Masticophis flagellum testaceus. Herp Rev. 28(1):52.
SB1 Boback, S., S. Link, C. Montgomery, J. Hobert, E. Bergman, B. Hill, and S. P. Mackessy. 1996. Geographic distribution: Chrysemys picta belli. Herp. Rev. 27(4):210.
SB2 Boback, S., S. Link, E. Bergman, B. Hill, C. Montgomery, J. Hobert, and S. P. Mackessy. 1996. Geographic distribution: Lampropeltis getula. Herp. Rev. 27(4):213.
SB3 Boback, S., C. Montgomery, J. Hobert, E. Bergman, B. Hill, and S. P. Mackessy. 1996. Geographic distribution: Thamnophis crytopsis crytopsis. Herp. Rev. 27(4):215.
SB4 Boback, S., E. Bergman, C. Montgomery, J. Hobert, B. Hill, and S. P. Mackessy. 1997. Geographic distribution: Gastrophryne olivacea. Herp. Rev. 28(1):48.
RLB1 Bunn, R. L. 1995. Geographic distribution: Spea multiplicata. Herp. Rev. 26(1):42.
TC1 Childers, T., E. Bergman, J. D. Manzer, and S. P. Mackessy. 1998. Geographic distribution: Rana catesbeiana. Herp. Rev. 29(4):247.
DC1 Chiszar, D., and J. D. Drew. 1991. Geographic distribution: Pseudacris triseriata. Herp. Rev. 22(4):134.
DC2 Chiszar, D., and H. M. Smith. 1992. Geographic distribution: Terrapene ornata ornata. Herp. Rev. 23(1):26.
DC3 Chiszar, D., J. D. Drew, and H. M. Smith. 1992. Geographic distribution: Coluber constrictor flaviventris. Herp. Rev. 23(3):90.
DC4 Chiszar, D., J. D. Drew, and H. M. Smith. 1993. A range extension of the Great Plains rat snake in eastern Colorado. Bull. Chicago Herpetol. Soc. 27(8):165.
DC5 Chiszar, D., and H. M. Smith. 1993. Geographic distribution: Crotalus viridis viridis. Herp. Rev. 24(4):156.
DC6 Chiszar, D., and H. M. Smith. 1994. Geographic distribution: Tantilla nigriceps. Herp. Rev. 25(4):168.
DC7 Chiszar, D., L. J. Livo, R. R. J. Smith, and H. M. Smith. 1995. Geographic distribution: Crotalus viridis. Herp. Rev. 26(3):156.
DC8 Chiszar, D., and H. M. Smith. 1995. Geographic distribution: Spea multiplicata. Herp. Rev. 26(4):208.
DC9 Chiszar, D., D. Theodoratus, and H. M. Smith. 1995. Geographic distribution: Rana catesbeiana. Herp. Rev. 26(4):208.
DC10 Chiszar, D., and H. M. Smith. 1995. Geographic distribution: Chelydra serpentina serpentina. Herp. Rev. 26(4):208.
JTC1 Chopko, J. T. 1995. The Texas night snake (Hypsiglena torquata) in Las Animas County, Colorado. Cold Blooded News (Colorado Herpetological Society) 22(1):4.
CJC1 Cole, C. J., and L. M. Hardy. 1981. Systematics of North American colubrid snakes related to Tantilla planiceps (Blainville). Bull. Amer. Mus. Nat. Hist. 171:199-284.
PSC1 Corn, P. S. and R. B. Bury. 1986. Morphological variation and zoogeography of racers (Coluber constrictor) in the central Rocky Mountains. Herpetologica 42(2):258-264.
RPDeF1 DeFusco, R. P., D. Chiszar, and H. M. Smith. 1993. Geographic distribution: Sceloporus undulatus erythrocheilus. Herp. Rev. 24(4):155.
RPDeF2 DeFusco, R. P., D. Chiszar, and H. M. Smith. 1994. Geographic distribution: Liochlorophis vernalis blanchardi. Herp. Rev. 25(2):77.
BDeS1 DeSantis, B., B. Sheafor, H. M. Smith, and D. Chiszar. 1995. Geographic distribution: Chelydra serpentina serpentina. Herp. Rev. 26(3):154.
RJD1 Donoho, R., J. Hobert, C. Montgomery, K. Waldron, and S. P. Mackessy. 1996. Geographic distribution: Eumeces obsoletus. Herp. Rev. 27(1):32.
RME1 Engeman, R. M., and R. W. Connell. 1990. Boreal toad in Clear Creek County, Colorado. Northwest. Nat. 71(3):98.
RME2 Engeman, R. M. 1994. Geographic distribution: Apalone spinifera. Herp. Rev. 25(4):162.
CF1 Fetkavich, C., L. Livo, and H. M. Smith. 1997. Geographic distribution: Pseudacris triseriata. Herp. Rev. 28(2):93.
CDOW1 Gloyd, cited in CDOW Herptile Database (record 6402).
DEH1 Hahn, D. E. 1968. A biogeographic analysis of the herpetofauna of the San Luis Valley, Colorado. Unpubl. M.S. thesis, Louisiana State University, Baton Rouge, 103 pp.
GAH1 Hammerson, G. A., and L. J. Livo. In press. Conservation status of the northern cricket frog (Acris crepitans) in Colorado and adjacent areas at the northwestern extent of the range. Herp. Rev.
GAH2 Hammerson, G. A., L. Valentine, and L. J. Livo. 1991. Geographic distribution: Bufo debilis. Herp. Rev. 22(2):64.
GAH3 Hammerson, G. A., L. Valentine, and L. J. Livo. 1991. Geographic distribution: Bufo punctatus. Herp. Rev. 22(2):64.
GAH4 Hammerson, G. A., L. Valentine, and L. J. Livo. 1991. Geographic distribution: Arizona elegans. Herp. Rev. 22(2):66.
GAH5 Hammerson, G. A., L. Valentine, and L. J. Livo. 1991. Geographic distribution: Coluber constrictor. Herp. Rev. 22(2):67.
GAH6 Hammerson, G. A., L. Valentine, and L. J. Livo. 1991. Geographic distribution: Masticophis flagellum. Herp. Rev. 22(2):67-68.
GAH7 Hammerson, G. A., L. Valentine, and L. J. Livo. 1991. Geographic distribution: Rhinocheilus lecontei. Herp. Rev. 22(2):68.
GAH8 Hammerson, G. A., L. Valentine, and L. J. Livo. 1991. Geographic distribution: Sistrurus catenatus. Herp. Rev. 22(2):68.
GAH9 Hammerson, G. A., L. Valentine, and L. J. Livo. 1991. Geographic distribution: Tantilla hobartsmithi. Herp. Rev. 22(2):69.
GAH10 Hammerson, G. A., L. Valentine, and L. J. Livo. 1991. Geographic distribution: Tantilla nigriceps. Herp. Rev. 22(2):69.
GAH11 Hammerson, G. A., L. Valentine, and L. J. Livo. 1991. Geographic distribution: Leptotyphlops dulcis. Herp. Rev. 22(3):103.
GAH12 Hammerson, G. A., and H. M. Smith. 1993. Geographic distribution: Rana pipiens. Herp. Rev. 24(4):154.
GAH13 Hammerson, G. A., and H. M. Smith. 1993. Geographic distribution: Thamnophis sirtalis. Herp. Rev. 24(4):157.
SH1 Hart, S., and S. Manchester. 1993. Geographic distribution: Elaphe guttata emoryi. Herp. Rev. 24(4):156.
BH1 Hill, B., E. Bergman, C. Montgomery, J. Hobert, S. Boback, and S. P. Mackessy. 1997. Geographic distribution: Rhinocheilus lecontei tessellatus. Herp. Rev. 28(1):52.
BH2 Hill, B., E. Bergman, S. Boback, C. Montgomery, J. Hobert, and S. P. Mackessy. Submitted. Geographic distribution: Spea multiplicata. Herp. Rev.
JH1 Hobert, J., B. Quinn, R. Donoho, C. Montgomery, K. Waldron, and S. P. Mackessy. 1996. Geographic distribution: Arizona elegans elegans. Herp. Rev. 27(1):33.
JH2 Hobert, J., R. Donoho, C. Montgomery, K. Waldron, and S. P. Mackessy. 1996. Geographic distribution: Coluber constrictor flaviventris. Herp. Rev. 27(1):33.
JH3 Hobert, J. E. Bergman, C. Montgomery, B. Hill, S. Boback, S. P. Mackessy, R. L. Holland, D. Chiszar, and H. M. Smith. 1996. Geographic distribution: Rana catesbeiana. Herp. Rev. 27(4):209.
JH4 Hobert, J., S. Boback, C. Montgomery, E. Bergman, B. Hill, and S. P. Mackessy. 1997. Geographic distribution: Sistrurus catenatus edwardsii. Herp. Rev. 28(1):52.
JH5 Hobert, J., C. Montgomery, T. Childers, J. D. Manzer, E. Bergman, J. Sifert, B. Hill, and S. P. Mackessy. 1998. Geographic distribution: Chelydra serpentina serpentina. Herp. Rev. 29(2):109.
RLH1 Holland, R. L., and H. M. Smith. 1993. Geographic distribution: Sceloporus undulatus garmani. Herp. Rev. 24(4):155.
RLH2 Holland, R. L., D. Chiszar, C. Ristau, and H. M. Smith. 1994. Geographic distribution: Chrysemys picta belli. Herp. Rev. 25(4):163.
RLH3 Holland, R. L., and H. M. Smith. 1994. Geographic distribution: Terrapene ornata ornata. Herp. Rev. 25(4):163.
RLH4 Holland, R. L., and H. M. Smith. 1994. Geographic distribution: Eumeces obsoletus. Herp. Rev. 25(4):164.
RLH5 Holland, R. L., D. Chiszar, C. Ristau, and H. M. Smith. 1994. Geographic distribution: Nerodia sipedon sipedon. Herp. Rev. 25(4):168.
RLH6 Holland, R. L., and H. M. Smith. Submitted. Geographic distribution: Rana catesbeiana. Herp. Rev.
CDOW2 Horstman (1947, UCM 2561), cited in CDOW Herptile Database.
GPH1 Horstman, G. 1995. Geographic distribution: Sceloporus graciosus graciosus. Herp. Rev. 26(1):45.
GPH2 Horstman, G. 1995. Geographic distribution: Pituophis catenifer deserticola. Herp. Rev. 26(1):47.
GPH3 Horstman, G. P. 1995. Geographic distribution: Pseudacris triseriata. Herp. Rev. 26(4):208.
RH1 Humphrey, R., D. Chiszar, and H. M. Smith. 1995. Geographic distribution: Chelydra serpentina. Herp. Rev. 26(2):106.
MJ1 Janos, M., and D. Guadagno. 1997. Delta area. Pp. 247-255 in: H. R. Holt. A birder's guide to Colorado. Colorado Springs, CO: American Birding Association.
SDK1 Keefer, S. D., and C. W. Loeffler. 1998. Geographic distribution: Kinosternon flavescens flavescens. Herpetol. Rev. 29(1):50.
JK1 Kehmeier, J., C. Wagner, and L. J. Livo. 1996. Geographic distribution: Pseudacris triseriata. Herp. Rev. 27(3):150.
CL1 Loeffler, C. (ed.). 1998. Conservation plan and agreement for the management and recovery of the southern Rocky Mountain Population of the boreal toad (Bufo boreas) [Draft]. Colorado Division of Wildlife.
LJL1 Livo, L. J. 1988. Distributional records of amphibians and reptiles from Colorado. Herp. Rev. 19(3):60.
LJL2 Livo, L. J. 1993. Spiny softshell turtle distribution in Colorado. Prairie Nat. 25(4):355-357.
LJL3 Livo, L. J., D. Chiszar, and H. M. Smith. 1995. Geographic distribution: Pseudacris triseriata. Herp. Rev. 26(4):208.
LJL4 Livo, L. J., D. Chiszar, and H. M. Smith. 1996. Geographic distribution: Liochlorophis (=Opheodrys) vernalis. Herp. Rev. 27(3):154.
LJL5 Livo, L. J., G. A. Hammerson, and H. M. Smith. 1998. Summary of amphibians and reptiles introduced into Colorado. Northwestern Nat. 79(1):1-11.
LJL6 Livo, L. J., pers. obs.; Hammerson, G. A., pers. comm. (3/1998).
LJL7 Livo, L. J., G. A. Hammerson, H. M. Smith, D. Chiszar, and S. P. Mackessy. 1998. Status of chorus frogs (Genus Pseudacris) in southeastern Colorado. Bull. Maryland Herpetol. Soc. 34(1):22-28.
LJL8 Livo, L. J. Pers. obs.
SM1 Mackessy, S., R. Donoho, J. Hobert, C. Montgomery, and K. Waldron. 1996. Geographic distribution: Pseudacris triseriata maculata. Herp. Rev. 27(1):30.
SM2 Mackessy, S. P., J. Hobert, R. Donoho, C. Montgomery, and K. Waldron. 1996. Geographic distribution: Sistrurus catenatus tergeminus/edwardsii. Herp. Rev. 27(1):36.
SM3 Mackessy, S. P. 1996. A survey of the herpetofauna of southeastern Colorado with a focus on the current status of two candidates for protected species status: the massasauga rattlesnake and the Texas horned lizard. Unpubl. rept., Colorado Division of Wildlife, Denver.
SM4 Mackessy, S., pers. comm. (3/1998).
CM1 Montgomery, C., K. Waldron, J. Hobert, R. Donoho, and S. P. Mackessy. 1996. Geographic distribution: Diadophis punctatus arnyi. Herp. Rev. 27(1):33.
CM2 Montgomery, C., K. Waldron, J. Hobert, R. Donoho, and S. P. Mackessy. 1996. Geographic distribution: Tantilla nigriceps nigriceps. Herp. Rev. 27(1):36.
CM3 Montgomery, C., J. Hobert, E. Bergman, B. Hill, S. Boback, and S. P. Mackessy. 1997. Geographic distribution: Lampropeltis triangulum gentilis. Herp. Rev. 28(1):52.
CM4 Montgomery, C., T. Childers, E. Bergman, J. D. Manzer, J. Sifert, B. Hill, and S. P. Mackessy. 1998. Geographic distribution: Lampropeltis triangulum gentilis. Herp. Rev. 29(2):114.
CM5 Montgomery, C., T. Childers, E. Bergman, J. D. Manzer, J. Sifert, B. Hill, and S. P. Mackessy. 1998. Geographic distribution: Sistrurus catenatus edwardsii. Herp. Rev. 29(2):116.
CM6 Montgomery, C., T. Childers, J. D. Manzer, E. Bergman, J. Sifert, B. Hill, and S. P. Mackessy. 1998. Geographic distribution: Phrynosoma cornutum. Herp. Rev. 29(2):110.
CM7 Montgomery, C., T. Childers, E. Bergman, J. D. Manzer, J. Sifert, B. Hill, and S. P. Mackessy. 1998. Submitted. Geographic distribution: Lampropeltis triangulum gentilis. Herp. Rev.
TM1 Mourning, T. 1998. Amphibian and reptile survey, north portion of West Region, 1994-1996. Unpubl. rept., Colorado Division of Wildlife, West Regional Service Center, Hot Sulfur Springs.
DON1 Norris, D. O., E. J. Clark, and T. Kellogg. 1994. Geographic distribution: Rana catesbeiana. Herp. Rev. 25(4):161.
STP1 Pegler, S. T., D. Chiszar, and H. M: Smith. 1995. Geographic distribution: Sistrurus catenatus tergeminus x edwardsii. Herp. Rev. 26(1):47.
CR1 Ramotnik, C. In prep.
GHR Rodeck, H. G. 1949. Notes on box turtles in Colorado. Copeia 1949(1):32-34.
JJR1 Roth, J. J., B. J. Johnson, and H. M. Smith. 1989. The western hognose snake, Heterodon nasicus, west of the Continental Divide in Colorado, and its implications. Bull. Chicago Herpetol. Soc. 24(9):161-163.
JJR2 Roth, J. J., and H. M. Smith. 1990. The milksnake, Lampropeltis triangulum, in northwest Colorado. Bull. Chicago Herpetol. Soc. 25(1):6-7.
JJR3 Roth, J. J., and H. M. Smith. 1990. Geographic distribution: Pituophis melanoleucus deserticola. Herp. Rev. 21(2):41.
BR1 Rouse, B., D. Chiszar, and H. M. Smith. 1995. Geographic distribution: Terrapene ornata ornata. Herp. Rev. 26(4):209.
JR1 Rybak, J. A., H. M. Smith, and D. Chiszar. 1995. Geographic distribution: Rana catesbeiana. Herp. Rev. 26(4):208.
JR2 Rybak, J. A., L. J. Livo, D. Chiszar, and H. M. Smith. 1996. Geographic distribution: Hypsiglena torquata loreala. Herp. Rev. 27(4):213.
BS1 Shipley, B., C. Henke, T. Morris, D. Chiszar, and H. M. Smith. 1996. Geographic distribution: Thamnophis crytopsis crytopsis. Herp. Rev. 27(4):215.
HMS1 Smith, H. M., T. P. Maslin, and R. L Brown. 1965. Summary of the distribution of the herpetofauna of Colorado. Univ. Colo. Stud., Ser. Biol. No. 15.
HMS2 Smith, H. M., G. A. Hammerson, J. J. Roth, and D. Chiszar. 1991. Distributional addenda for the smooth green snake (Opheodrys vernalis) in western Colorado, and the status of its subspecies. Bull. Maryland Herpetol. Soc. 27(2):99-106.
HMS3 Smith, H. M. 1991. Three new records of lizards in Ouray County, Colorado. Bull. Chicago Herpetol. Soc. 26(10):223.
HMS4 Smith, H. M., and D. Thompson. 1993. Four reptiles newly recorded from Ouray County, Colorado. Bull. Chicago Herpetol. Soc. 28(4):78-79.
HMS5 Smith, H. M., and R. L. Holland. 1993. Geographic distribution: Eumeces obsoletus. Herp. Rev. 24(2):66.
HMS6 Smith, H. M., and R. L. Holland. 1993. Geographic distribution: Eumeces multivirgatus multivirgatus. Herp. Rev. 24(2):66.
HMS7 Smith, H. M., G. A. Hammerson, D. Chiszar, and C. Ramotnik. 1993. Geographic distribution: Bufo cognatus. Herp. Rev. 24(4):152-153.
HMS8 Smith, H. M., G. A. Hammerson, D. Chiszar, and C. Ramotnik. 1993. Geographic distribution: Pseudacris triseriata. Herp. Rev. 24(4):153.
HMS9 Smith, H. M., G. A. Hammerson, D. Chiszar, and C. Ramotnik. 1993. Geographic distribution: Rana pipiens. Herp. Rev. 24(4):153.
HMS10 Smith, H. M., G. A. Hammerson, D. Chiszar, and C. Ramotnik. 1993. Geographic distribution: Eumeces multivirgatus multivirgatus. Herp. Rev. 24(4):154.
HMS11 Smith, H. M., G. A. Hammerson, D. Chiszar, and C. Ramotnik. 1993. Geographic distribution: Nerodia sipedon sipedon. Herp. Rev. 24(4):156.
HMS12 Smith, H. M., G. A. Hammerson, D. Chiszar, and C. Ramotnik. 1993. Geographic distribution: Crotalus viridis viridis. Herp. Rev. 24(4):156.
HMS13 Smith, H. M., G. A. Hammerson, D. Chiszar, and C. Ramotnik. 1993. Geographic distribution: Tantilla nigriceps. Herp. Rev. 24(4):157.
HMS14 Smith, H. M., and D. Chiszar. 1994. Geographic distribution: Tropidoclonion lineatum. Herp. Rev. 25(1):35.
HMS15 Smith, H. M., M. Laverty, and D. Chiszar. 1995. Geographic distribution: Pseudacris triseriata. Herp. Rev. 26(4):208.
HMS16 Smith, H. M., and D. Chiszar. 1995. Geographic distribution: Chrysemys picta belli. Herp. Rev. 26(3):154.
HMS17 Smith, H. M., C. Ristau, T. Bell, M. Bell, and D. Chiszar. 1995. Geographic distribution: Lampropeltis triangulum multistriata x taylori. Herp. Rev. 26(4):210.
HMS18 Smith, H. M., D. Chiszar, and J. J. Roth. 1996. Geographic distribution: Urosaurus ornatus wrighti. Herp. Rev. 27(4):211-212.
PHS1 Somers, P. H., L. J. Livo, R. R. J. Smith, D. Chiszar, and H. M. Smith. 1995. Geographic distribution: Coluber constrictor mormon. Herp. Rev. 26(3):156.
AS1 Spencer, A. 1971. Boreal chorus frogs (Pseudacris triseriata) breeding in the alpine in southwestern Colorado. Arctic Alpine Res. 3:353.
AS2 Spencer, A. pers. comm. (3/1998).
RHS1 Sperger, R. H., R. Humphrey, D. Chiszar, and H. M. Smith. 1995. Geographic distribution: Chelydra serpentina serpentina. Herp. Rev. 26(1):43.
RHS2 Sperger, R. H., R. Humphrey, D. Chiszar, and H. M. Smith. 1995. Geographic distribution: Chrysemys picta belli. Herp. Rev. 26(1):43.
RHS3 Sperger, R. H., R. Humphrey, D. Chiszar, and H. M. Smith. 1995. Geographic distribution: Coluber constrictor flaviventris. Herp. Rev. 26(1):46.
CAT1 Travis, C. A., D. Chiszar, and H. M. Smith. 1996. Geographic distribution: Heterodon nasicus. Herp Rev. 27(4):212.
CDOW3 Valentine, cited in CDOW Herptile Database (record number 8296).
FVanB1 Van Breukelen, F., J. Roth, and D. Chiszar. 1997. Geographical distribution: Sceloporus undulatus elongatus. Herpetol. Rev. 28(3):158.
KW1 Waldron, K., C. Montgomery, J. Hobert, R. Donoho, and S. P. Mackessy. 1996. Geographic distribution: Rhinocheilus lecontei tessellatus. Herp. Rev. 27(1):35.
JMW1 Walker, J. M., J. E. Cordes, and H. L. Taylor. 1997. Parthenogenetic Cnemidophorus tesselatus Complex (Sauria: Teiidae): a neotype for diploid C. tesselatus (Say, 1823), redescription of the taxon, and description of a new triploid species. Herpetologica 53(2):233-259.
JW1 Weins, J. 1987. La Junta side-trip. Colorado Herpetological Society Newsletter 15(6):4.
RJW1 Wiese, R. J. 1990. Survey of the bullfrog along the Front Range and in eastern Colorado, 1989. Unpubl. rept., Colorado Division of Wildlife, Denver.
BDW1 Will, B. D., D. Chiszar, and H. M. Smith. 1995. Geographic distribution: Chelydra serpentina serpentina. Herp. Rev. 26(4):208.
MBW1 Wunder, M. B., J. L. Siemers, and A. E. Ochs. 1998. Geographic distribution: Spea bombifrons Herpetol. Rev. 29(1):50.