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Denver-Boulder Metro Area: Bugs

This guide contains spiders, bees, wasps, ants, beetles, dragonflies, grasshoppers, flies and other bugs that can be found in the Denver-Boulder Metro Area, including Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas, and Jefferson Counties.

24-spot Ladybird 1
Subcoccinella vigintiquatuorpunctata
Aceria trichophila 2
Adejeania vexatrix 3
Adonis Ladybird 4
Hippodamia variegata
Agile Long-horned Bee 5
Melissodes agilis
Alder Leaf Gall Mite 2
Eriophyes laevis
Alfalfa Leafcutter Bee 6
Megachile rotundata
Alkali Bluet 7
Enallagma clausum
American Bumble Bee 8
Bombus pensylvanicus
American Cellar Spider 9
Pholcophora americana
American Dog Tick 10
Dermacentor variabilis
American Pelecinid 11
Pelecinus polyturator
American Rubyspot 7
Hetaerina americana
Ammophila ferruginosa 12
Anastrangalia sanguinea 13
Andrena 14
Apache Jumping Spider 15
Phidippus apacheanus
Arabesque Orbweaver 16
Neoscona arabesca
Ash Bead Gall Mite 17
Aceria fraxini
Asian Lady Beetle 18
Harmonia axyridis
Asiatic Wall Jumping Spider 19
Attulus fasciger
Attinella dorsata 20
Attractive Running Crab Spider 21
Rhysodromus histrio
Attulus ammophilus 22
Autumn Meadowhawk 23
Sympetrum vicinum
Bald-faced Hornet 24
Dolichovespula maculata
Band-winged Meadowhawk 25
Sympetrum semicinctum
Banded Forestfly 26
Prostoia besametsa
Banded Garden Spider 27
Argiope trifasciata
Banded Sexton Beetle 23
Nicrophorus investigator
Barn Funnel Weaver 28
Tegenaria domestica
Bee Assassin 29
Apiomerus spissipes
Beewolf 30
Philanthus gibbosus
Belted Whiteface 25
Leucorrhinia proxima
Bent-shielded Besieger Wasp 31
Gnamptopelta obsidianator
Bicolored Carpenter Ant 13
Camponotus vicinus
Bicolored Striped Sweat Bee 32
Agapostemon virescens
Big Sand Tiger Beetle 33
Cicindela formosa
Big-eyed Toad Bug 34
Gelastocoris oculatus
Big-headed Ground Beetle 35
Scarites subterraneus
Black Cherry Leaf Gall Mite 30
Eriophyes cerasicrumena
Black Laceweaver 36
Amaurobius ferox
Black Meadowhawk 23
Sympetrum danae
Black Saddlebags 7
Tramea lacerata
Black-and-gold Bumble Bee 37
Bombus auricomus
Black-and-red Horntail 38
Urocerus cressoni
Black-and-yellow Mud Dauber 39
Sceliphron caementarium
Black-notched Bumble Bee 40
Bombus bifarius
Blackhorned Pine Borer 41
Callidium antennatum
Blowout Tiger Beetle 42
Cicindela lengi
Blue Dasher 43
Pachydiplax longipennis
Blue Fungus Beetle 44
Gibbifer californicus
Blue Mud Dauber 45
Chalybion californicum
Blue Shieldbug 46
Zicrona caerulea
Blue-eyed Darner 7
Rhionaeschna multicolor
Blue-margined Ground Beetle 47
Pasimachus elongatus
Bold Jumper 48
Phidippus audax
Boreal Bluet 23
Enallagma boreale
Bothrotes canaliculatus 49
Bowl-and-doily Spider 50
Frontinella pyramitela
Boxwood Mite 51
Eurytetranychus buxi
Brilliant Jumping Spider 52
Phidippus clarus
Bristly Millipede 53
Polyxenus lagurus
Bronze Jumping Spider 19
Eris militaris
Bronzed Tiger Beetle 34
Cicindela repanda
Brown Marmorated Stink Bug 54
Halyomorpha halys
Brown Recluse 55
Loxosceles reclusa
Brown Stink Bug 8
Euschistus servus
Brown-belted Bumble Bee 56
Bombus griseocollis
Bumble Flower Beetle 4
Euphoria inda
Bumble-bee-mimic Digger Bee 57
Anthophora bomboides
Buprestis confluenta 58
Buttonhook Leaf-beetle Jumping Spider 59
Sassacus vitis
Cactus Coreid 18
Chelinidea vittiger
Calico Pennant 60
Celithemis elisa
California Cuckoo Bee 61
Xeromelecta californica
California Flattened Jumping Spider 62
Platycryptus californicus
California Prionus 63
Prionus californicus
Canada Thistle Bud Weevil 64
Larinus carlinae
Cantharis pallida 65
Cardinal Jumping Spider 66
Phidippus cardinalis
Carolina Grasshopper 67
Dissosteira carolina
Carolina Jumping Spider 68
Phidippus carolinensis
Carolina Wolf Spider 69
Hogna carolinensis
Castianeira alteranda 21
Cat-faced Orb-Weaver 70
Araneus gemmoides
Charcoal Seed Bug 18
Melacoryphus lateralis
Chauliognathus deceptus 44
Checkered melon beetle 71
Paranapiacaba tricincta
Cherry-faced Meadowhawk 25
Sympetrum internum
Chinese Mantis 72
Tenodera sinensis
Chrysanthrax cypris 69
Cochineal Bug 73
Dactylopius coccus
Colorado Forestfly 74
Malenka coloradensis
Colorado Soldier Beetle 75
Chauliognathus basalis
Common Aerial Yellowjacket 76
Dolichovespula arenaria
Common Asparagus Beetle 77
Crioceris asparagi
Common Bed Bug 78
Cimex lectularius
Common Claybank Tiger Beetle 79
Cicindela limbalis
Common Desert Centipede 80
Scolopendra polymorpha

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

Photo Credits

  • 1. (c) Alejandro Ocampo, some rights reserved (CC BY-NC), uploaded by Alejandro Ocampo
  • 2. (c) Garth Harwood, some rights reserved (CC BY), uploaded by Garth Harwood
  • 3. (c) tomoclark, some rights reserved (CC BY-NC), uploaded by tomoclark
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  • 7. (c) Greg Lasley, some rights reserved (CC BY-NC), uploaded by Greg Lasley
  • 8. (c) Carolyn Gritzmaker, some rights reserved (CC BY-NC), uploaded by Carolyn Gritzmaker
  • 9. (c) K Schneider, some rights reserved (CC BY-NC), uploaded by K Schneider
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  • 14. (c) Cécile Bassaglia, some rights reserved (CC BY-NC-SA)
  • 15. (c) John Sullivan, some rights reserved (CC BY-NC), uploaded by John Sullivan
  • 16. (c) Denis Doucet, some rights reserved (CC BY-NC), uploaded by Denis Doucet
  • 17. (c) Ken Potter, some rights reserved (CC BY-NC), uploaded by Ken Potter
  • 18. (c) Katja Schulz, some rights reserved (CC BY)
  • 19. no rights reserved, uploaded by Zygy
  • 20. (c) Tobi (he/him), some rights reserved (CC BY), uploaded by Tobi (he/him)
  • 21. (c) Steven Mlodinow, some rights reserved (CC BY-NC), uploaded by Steven Mlodinow
  • 22. (c) calebcam, some rights reserved (CC BY-NC), uploaded by calebcam
  • 23. (c) Jim Johnson, some rights reserved (CC BY-NC-ND), uploaded by Jim Johnson
  • 24. (c) Fritz Geller-Grimm, some rights reserved (CC BY-SA)
  • 25. (c) J. N. Stuart, some rights reserved (CC BY-NC-ND)
  • 26. (c) Colorado Parks and Wildlife, all rights reserved, uploaded by Colorado Parks and Wildlife
  • 27. (c) Ferran Pestaña, some rights reserved (CC BY-NC)
  • 28. (c) Mike Bowie, some rights reserved (CC BY-NC), uploaded by Mike Bowie
  • 29. (c) Samuel Huckins, some rights reserved (CC BY-NC-SA)
  • 30. (c) Judy Gallagher, some rights reserved (CC BY), uploaded by Judy Gallagher
  • 31. (c) Cody Hough, some rights reserved (CC BY-NC)
  • 32. (c) molanic, some rights reserved (CC BY-NC), uploaded by molanic
  • 33. (c) Ted MacRae, some rights reserved (CC BY-NC-ND)
  • 34. (c) Patrick Coin, some rights reserved (CC BY-NC-SA)
  • 35. (c) Jason M Crockwell, some rights reserved (CC BY-NC-ND), uploaded by Jason M Crockwell
  • 36. (c) Even Dankowicz, some rights reserved (CC BY), uploaded by Even Dankowicz
  • 37. (c) Mark Nofsinger, some rights reserved (CC BY-NC), uploaded by Mark Nofsinger
  • 38. (c) Joe Walewski, some rights reserved (CC BY-NC), uploaded by Joe Walewski
  • 39. (c) A. Jaszlics, some rights reserved (CC BY-NC)
  • 40. (c) Sean McCann, some rights reserved (CC BY-NC-SA)
  • 41. (c) bryan-maltais, some rights reserved (CC BY-NC), uploaded by bryan-maltais
  • 42. (c) Andy Teucher, some rights reserved (CC BY-NC)
  • 43. (c) Dave Spier, some rights reserved (CC BY-NC-ND), uploaded by Dave Spier
  • 44. (c) Scot Pipkin, some rights reserved (CC BY-NC-SA), uploaded by Scot Pipkin
  • 45. (c) Jimmy Smith, some rights reserved (CC BY-NC-ND)
  • 46. (c) Jakob Fahr, some rights reserved (CC BY-NC), uploaded by Jakob Fahr
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  • 48. (c) Juan Cruzado Cortés, some rights reserved (CC BY-SA), uploaded by Juan Cruzado Cortés
  • 49. (c) Lena Zappia, some rights reserved (CC BY-NC), uploaded by Lena Zappia
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  • 51. (c) Susan J. Hewitt, some rights reserved (CC BY-NC), uploaded by Susan J. Hewitt
  • 52. (c) Thomas Shahan, some rights reserved (CC BY-NC-ND)
  • 53. (c) Marcello Consolo, some rights reserved (CC BY-NC-SA)
  • 54. (c) Kurt Andreas, some rights reserved (CC BY-NC-SA)
  • 55. (c) James W. Beck, some rights reserved (CC BY-NC), uploaded by James W. Beck
  • 56. no rights reserved, uploaded by USGS Bee Inventory and Monitoring Lab
  • 57. (c) USGS Native Bee Inventory and Monitoring Laboratory, some rights reserved (CC BY)
  • 58. (c) Kaitlin Backlund, some rights reserved (CC BY-NC-ND), uploaded by Kaitlin Backlund
  • 59. (c) Kurt Komoda, some rights reserved (CC BY-NC-ND)
  • 60. (c) Diana-Terry Hibbitts, some rights reserved (CC BY-NC), uploaded by Diana-Terry Hibbitts
  • 61. (c) Donna Pomeroy, some rights reserved (CC BY-NC), uploaded by Donna Pomeroy
  • 62. (c) Thomas Barbin, some rights reserved (CC BY-NC), uploaded by Thomas Barbin
  • 63. (c) Peachland Joe, some rights reserved (CC BY-NC-SA)
  • 64. (c) Erik Attaway, some rights reserved (CC BY-NC), uploaded by Erik Attaway
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  • 67. (c) Lauren Sobkoviak, some rights reserved (CC BY-NC-ND)
  • 68. (c) Meghan Cassidy, some rights reserved (CC BY-SA), uploaded by Meghan Cassidy
  • 69. (c) Royal Tyler, some rights reserved (CC BY-NC-SA), uploaded by Royal Tyler
  • 70. (c) Bob O'Kennon, some rights reserved (CC BY-NC), uploaded by Bob O'Kennon
  • 71. (c) BJ Stacey, some rights reserved (CC BY-NC), uploaded by BJ Stacey
  • 72. (c) John B., some rights reserved (CC BY)
  • 73. (c) Frank Vincentz, some rights reserved (CC BY-SA)
  • 74. (c) Corey Lange, some rights reserved (CC BY-NC), uploaded by Corey Lange
  • 75. (c) Scott Tucker, some rights reserved (CC BY-NC-ND)
  • 76. (c) Gilles Gonthier, some rights reserved (CC BY)
  • 77. (c) Ryan Hodnett, some rights reserved (CC BY-SA)
  • 78. (c) Gilles San Martin, some rights reserved (CC BY-SA)
  • 79. (c) Brad Smith, some rights reserved (CC BY-NC)
  • 80. (c) Ken-ichi Ueda, some rights reserved (CC BY)

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