• Guides
  • Denver-Boulder Metro Area: Wildlife

Denver-Boulder Metro Area: Wildlife

This guide contains mammals, reptiles, amphibians, fish, and mollusks that can be found in the Denver-Boulder Metro Area, including Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas, and Jefferson Counties.

Great Plains Toad 1
Anaxyrus cognatus
Woodhouse's Toad 2
Anaxyrus woodhousii
Boreal Chorus Frog 3
Pseudacris maculata
Cuban Tree Frog 4
Osteopilus septentrionalis
Green Treefrog 5
Hyla cinerea
American Bullfrog 4
Lithobates catesbeianus
Northern Leopard Frog 6
Lithobates pipiens
Plains Spadefoot 7
Spea bombifrons
Western Tiger Salamander 8
Ambystoma mavortium
Brown Anole 9
Anolis sagrei
Prairie Lizard 10
Sceloporus consobrinus
Sagebrush Lizard 11
Sceloporus graciosus
Western Fence Lizard 12
Sceloporus occidentalis
Plateau Fence Lizard 13
Sceloporus tristichus
Greater Short-horned Lizard 14
Phrynosoma hernandesi
Western Earless Lizard 15
Holbrookia maculata
Many-lined Skink 16
Plestiodon multivirgatus
Triploid Checkered Whiptail 17
Aspidoscelis neotesselatus
Six-lined Racerunner 18
Aspidoscelis sexlineatus
Prairie Racerunner 19
Aspidoscelis sexlineatus viridis
Lined Snake 20
Tropidoclonion lineatum
Western Terrestrial Garter Snake 3
Thamnophis elegans
Wandering Garter Snake 21
Thamnophis elegans vagrans
Plains Garter Snake 22
Thamnophis radix
Common Garter Snake 23
Thamnophis sirtalis
Red-sided Garter Snake 24
Thamnophis sirtalis parietalis
Northern Watersnake 25
Nerodia sipedon
Plains Hognose Snake 16
Heterodon nasicus
Coachwhip 26
Masticophis flagellum
North American Racer 27
Coluber constrictor
Yellowbelly Racer 26
Coluber constrictor flaviventris
Plains Black-headed Snake 28
Tantilla nigriceps
Gopher Snake 3
Pituophis catenifer
Bullsnake 1
Pituophis catenifer sayi
Smooth Greensnake 29
Opheodrys vernalis
Western Milksnake 30
Lampropeltis gentilis
Corn Snake 31
Pantherophis guttatus
Western Rattlesnake 32
Crotalus oreganus
Prairie Rattlesnake 33
Crotalus viridis
Spiny Softshell 34
Apalone spinifera
Common Snapping Turtle 35
Chelydra serpentina
Common Box Turtle 36
Terrapene carolina
Ornate Box Turtle 37
Terrapene ornata
Painted Turtle 3
Chrysemys picta
Western Painted Turtle 3
Chrysemys picta bellii
Pond Slider 38
Trachemys scripta
Red-eared Slider 39
Trachemys scripta elegans
Northern Map Turtle 40
Graptemys geographica
Ouachita Map Turtle 41
Graptemys ouachitensis
False Map Turtle 42
Graptemys pseudogeographica
Virginia Opossum 43
Didelphis virginiana
Desert Cottontail 44
Sylvilagus audubonii
Eastern Cottontail 45
Sylvilagus floridanus
Mountain Cottontail 46
Sylvilagus nuttallii
Snowshoe Hare 47
Lepus americanus
Black-tailed Jackrabbit 48
Lepus californicus
White-tailed Jackrabbit 10
Lepus townsendii
European Rabbit 49
Oryctolagus cuniculus
American Pika 50
Ochotona princeps
Abert's Squirrel 28
Sciurus aberti
Fox Squirrel 51
Sciurus niger
Southwestern Red Squirrel 52
Tamiasciurus fremonti
American Red Squirrel 53
Tamiasciurus hudsonicus
Least Chipmunk 54
Neotamias minimus
Colorado Chipmunk 3
Neotamias quadrivittatus
Uinta Chipmunk 55
Neotamias umbrinus
Rock Squirrel 56
Otospermophilus variegatus
Golden-mantled Ground Squirrel 3
Callospermophilus lateralis
Thirteen-lined Ground Squirrel 28
Ictidomys tridecemlineatus
Spotted Ground Squirrel 57
Xerospermophilus spilosoma
Wyoming Ground Squirrel 58
Urocitellus elegans
Yellow-bellied Marmot 59
Marmota flaviventris
Gunnison's Prairie Dog 60
Cynomys gunnisoni
Black-tailed Prairie Dog 61
Cynomys ludovicianus
American Beaver 62
Castor canadensis
Plains Pocket Gopher 42
Geomys bursarius
Northern Pocket Gopher 63
Thomomys talpoides
Hispid Pocket Mouse 64
Chaetodipus hispidus
Olive-backed Pocket Mouse 65
Perognathus fasciatus
Plains Pocket Mouse 66
Perognathus flavescens
Silky Pocket Mouse 64
Perognathus flavus
Ord's Kangaroo Rat 67
Dipodomys ordii
North American Porcupine 68
Erethizon dorsatum
Brown Rat 69
Rattus norvegicus
House Mouse 70
Mus musculus
Western Heather Vole 71
Phenacomys intermedius
Muskrat 72
Ondatra zibethicus
Long-tailed Vole 73
Microtus longicaudus
Montane Vole 74
Microtus montanus
Prairie Vole 36
Microtus ochrogaster
Meadow Vole 75
Microtus pennsylvanicus
Southern Red-backed Vole 76
Myodes gapperi
Brush Mouse 64
Peromyscus boylii
Deer Mouse 77
Peromyscus maniculatus
Western Harvest Mouse 3
Reithrodontomys megalotis
Plains Harvest Mouse 78
Reithrodontomys montanus
Northern Grasshopper Mouse 79
Onychomys leucogaster
White-throated Woodrat 3
Neotoma albigula
Bushy-tailed Wood Rat 80
Neotoma cinerea
Mexican Woodrat 64
Neotoma mexicana

Edited by Colorado Parks and Wildlife, some rights reserved (CC BY-SA)

Photo Credits

  • 1. (c) tom spinker, some rights reserved (CC BY-NC-ND)
  • 2. (c) Donna Fernstrom, some rights reserved (CC BY), uploaded by Donna Fernstrom
  • 3. (c) J. N. Stuart, some rights reserved (CC BY-NC-ND)
  • 4. (c) copepodo, some rights reserved (CC BY-NC-ND)
  • 5. (c) Saunders Drukker, some rights reserved (CC BY-NC), uploaded by Saunders Drukker
  • 6. (c) Stylurus, some rights reserved (CC BY-NC-ND)
  • 7. (c) 2011 Todd Pierson, some rights reserved (CC BY-NC)
  • 8. (c) 2007 Henk Wallays, some rights reserved (CC BY-NC)
  • 9. (c) Jill Bazeley, some rights reserved (CC BY-NC)
  • 10. (c) Greg Lasley, some rights reserved (CC BY-NC), uploaded by Greg Lasley
  • 11. (c) Franco Folini, some rights reserved (CC BY)
  • 12. (c) David Hofmann, some rights reserved (CC BY-NC-ND)
  • 13. (c) Judith Ellen Lopez, some rights reserved (CC BY-NC), uploaded by Judith Ellen Lopez
  • 14. (c) Bill Lupardus, some rights reserved (CC BY-NC), uploaded by Bill Lupardus
  • 15. (c) David Bygott, some rights reserved (CC BY-NC)
  • 16. (c) Chris Harrison, some rights reserved (CC BY-NC), uploaded by Chris Harrison
  • 17. (c) John Sullivan, some rights reserved (CC BY-NC), uploaded by John Sullivan
  • 18. (c) rsnyder11, some rights reserved (CC BY-NC-SA), uploaded by rsnyder11
  • 19. (c) Jack Goldfarb, some rights reserved (CC BY-NC-SA)
  • 20. (c) Mike Keeling, some rights reserved (CC BY-ND)
  • 21. (c) johnwilliams, some rights reserved (CC BY-NC), uploaded by johnwilliams
  • 22. (c) Jeff Skrentny, some rights reserved (CC BY-NC), uploaded by Jeff Skrentny
  • 23. (c) Mark Kluge, some rights reserved (CC BY-NC-ND), uploaded by Mark Kluge
  • 24. (c) Jake Scott, some rights reserved (CC BY-NC), uploaded by Jake Scott
  • 25. (c) Douglas Mills, some rights reserved (CC BY-NC-ND)
  • 26. (c) Diana-Terry Hibbitts, some rights reserved (CC BY-NC), uploaded by Diana-Terry Hibbitts
  • 27. (c) Alan Wolf, some rights reserved (CC BY-NC-ND), uploaded by Alan Wolf
  • 28. (c) Jerry Oldenettel, some rights reserved (CC BY-NC-SA)
  • 29. (c) squamatologist, some rights reserved (CC BY-NC-ND)
  • 30. (c) dkwalkup, some rights reserved (CC BY-NC-SA), uploaded by dkwalkup
  • 31. (c) evangrimes, some rights reserved (CC BY), uploaded by evangrimes
  • 32. (c) acorbit, some rights reserved (CC BY-NC)
  • 33. (c) Jason Headley, some rights reserved (CC BY-NC), uploaded by Jason Headley
  • 34. (c) Kala Murphy King, some rights reserved (CC BY-NC-ND), uploaded by Kala Murphy King
  • 35. (c) Tsui, some rights reserved (CC BY-SA)
  • 36. (c) Lee Elliott, some rights reserved (CC BY-NC-SA), uploaded by Lee Elliott
  • 37. (c) Rebecca, some rights reserved (CC BY-NC), uploaded by Rebecca
  • 38. (c) J. N. Stuart, all rights reserved, uploaded by J. N. Stuart
  • 39. (c) mlhradio, some rights reserved (CC BY-NC)
  • 40. (c) Peter Paplanus, some rights reserved (CC BY)
  • 41. (c) Antonio Xeira, some rights reserved (CC BY-NC), uploaded by Antonio Xeira
  • 42. (c) Sam Kieschnick, some rights reserved (CC BY), uploaded by Sam Kieschnick
  • 43. (c) Greg Hanisek, some rights reserved (CC BY-NC), uploaded by Greg Hanisek
  • 44. (c) Howard Cheng, some rights reserved (CC BY-SA)
  • 45. (c) Jim, the Photographer, some rights reserved (CC BY)
  • 46. (c) Judith Ellen Lopez, some rights reserved (CC BY-NC)
  • 47. (c) Sue Wetmore, some rights reserved (CC BY-NC), uploaded by Sue Wetmore
  • 48. (c) Mike Baird, some rights reserved (CC BY)
  • 49. (c) Alex J., some rights reserved (CC BY)
  • 50. (c) Daniele Colombo, some rights reserved (CC BY-NC-SA)
  • 51. (c) TexasEagle, some rights reserved (CC BY-NC)
  • 52. (c) Adrienne McLeod, some rights reserved (CC BY-NC), uploaded by Adrienne McLeod
  • 53. (c) DaPuglet, some rights reserved (CC BY-SA)
  • 54. (c) Kevin Metcalf, some rights reserved (CC BY-NC), uploaded by Kevin Metcalf
  • 55. (c) msr, some rights reserved (CC BY-NC), uploaded by msr
  • 56. (c) Anders Illum, some rights reserved (CC BY-NC-ND)
  • 57. (c) Terry Ross, some rights reserved (CC BY-SA)
  • 58. (c) Soheil Zendeh, some rights reserved (CC BY-NC-SA)
  • 59. (c) Ken-ichi Ueda, some rights reserved (CC BY-NC-SA)
  • 60. (c) Andrew Hollander, some rights reserved (CC BY-NC-SA)
  • 61. (c) Arthur Chapman, some rights reserved (CC BY-NC-SA)
  • 62. (c) Minette, some rights reserved (CC BY-NC)
  • 63. (c) Alison Young, some rights reserved (CC BY-NC), uploaded by Alison Young
  • 64. (c) Juan Cruzado Cortés, some rights reserved (CC BY-SA), uploaded by Juan Cruzado Cortés
  • 65. US Fish & Wildlife Service, no known copyright restrictions (public domain)
  • 66. (c) Todd Fitzgerald, some rights reserved (CC BY-NC), uploaded by Todd Fitzgerald
  • 67. (c) randomtruth, some rights reserved (CC BY-NC-SA)
  • 68. (c) Danny Barron, some rights reserved (CC BY-NC-ND)
  • 69. (c) Mark Philpott, some rights reserved (CC BY-NC)
  • 70. (c) Davide, some rights reserved (CC BY-SA)
  • 71. (c) Jeremy Yoder, some rights reserved (CC BY-NC)
  • 72. (c) Vitaliy Khustochka, some rights reserved (CC BY-NC)
  • 73. (c) J. Maughn, some rights reserved (CC BY-NC), uploaded by J. Maughn
  • 74. (c) 1999 California Academy of Sciences, some rights reserved (CC BY-NC-SA)
  • 75. (c) cyric, some rights reserved (CC BY-NC-SA), uploaded by cyric
  • 76. (c) Mike, some rights reserved (CC BY-NC), uploaded by Mike
  • 77. (c) Don Loarie, some rights reserved (CC BY), uploaded by Don Loarie
  • 78. (c) Elizabeth Esperanza Aragón Piña, some rights reserved (CC BY-NC), uploaded by Elizabeth Esperanza Aragón Piña
  • 79. (c) Gerson Herrera, some rights reserved (CC BY-NC), uploaded by Gerson Herrera
  • 80. (c) latraydean, some rights reserved (CC BY-NC)

Member of the iNaturalist Network   |   Powered by iNaturalist open source software |   Documentation for developers