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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.

American Bumble Bee 1
Bombus pensylvanicus
Golden Northern Bumble Bee 2
Bombus fervidus
Western Bumble Bee 3
Bombus occidentalis
Western Honey Bee 4
Apis mellifera
Golden Sweat Bee 5
Augochlorella aurata
Green Metallic Sweat Bee 6
Augochloropsis metallica
Bicolored Striped Sweat Bee 7
Agapostemon virescens
Ligated Furrow Bee 8
Halictus ligatus
Orange-legged Furrow Bee 9
Halictus rubicundus
Zephyr Sweat Bee 10
Lasioglossum zephyrum
European Wool Carder Bee 11
Anthidium manicatum
Alfalfa Leafcutter Bee 12
Megachile rotundata
Common Little Leaf-cutter Bee 3
Megachile brevis
Andrena 13
European paper wasp 14
Polistes dominula
Golden Paper Wasp 15
Polistes aurifer
Dark Paper Wasp 16
Polistes fuscatus
Western Paper Wasp 9
Mischocyttarus flavitarsis
Parasitic Yellowjacket 17
Dolichovespula arctica
Common Aerial Yellowjacket 18
Dolichovespula arenaria
Bald-faced Hornet 19
Dolichovespula maculata
Prairie Yellowjacket 20
Vespula atropilosa
Western Yellowjacket 21
Vespula pensylvanica
Thyreodon atricolor 22
Bent-shielded Besieger Wasp 23
Gnamptopelta obsidianator
Long-tailed Giant Ichneumonid Wasp 24
Megarhyssa macrurus
American Pelecinid 25
Pelecinus polyturator
Spiny Leaf Gall Wasp 26
Diplolepis polita
Pigeon Tremex 27
Tremex columba
Black-and-red Horntail 28
Urocerus cressoni
Elm Sawfly 29
Cimbex americana
Punctured Tiger Beetle 30
Cicindela punctulata
Green Claybank Tiger Beetle 31
Cicindela denverensis
Twelve-spotted Tiger Beetle 32
Cicindela duodecimguttata
Big Sand Tiger Beetle 33
Cicindela formosa
Blowout Tiger Beetle 34
Cicindela lengi
Common Claybank Tiger Beetle 32
Cicindela limbalis
Western Tiger Beetle 35
Cicindela oregona
Purple Tiger Beetle 36
Cicindela purpurea
Bronzed Tiger Beetle 37
Cicindela repanda
Festive Tiger Beetle 33
Cicindela scutellaris
Oblique-lined Tiger Beetle 33
Cicindela tranquebarica
Blue-margined Ground Beetle 38
Pasimachus elongatus
Big-headed Ground Beetle 6
Scarites subterraneus
Common black ground beetle 39
Pterostichus melanarius
Wood Ground-beetle 40
Carabus nemoralis
Zygogramma conjuncta 41
St. Johnswort Beetle 42
Chrysolina hyperici
Green Dock Beetle 43
Gastrophysa cyanea
Knab's Leaf Beetle 44
Chrysomela knabi
Cottonwood Leaf Beetle 35
Chrysomela scripta
Willow Leaf Beetle 45
Plagiodera versicolora
Striped Willow Leaf Beetle 9
Disonycha alternata
Three-spotted Flea Beetle 46
Disonycha triangularis
Spinach Flea Beetle 47
Disonycha xanthomelas
Sumac Flea Beetle 48
Blepharida rhois
Checkered melon beetle 49
Paranapiacaba tricincta
Spotted Cucumber Beetle 7
Diabrotica undecimpunctata
Phyllobrotica decorata 17
Waterlily Leaf Beetle 31
Galerucella nymphaeae
Dogbane Leaf Beetle 50
Chrysochus auratus
Common Asparagus Beetle 51
Crioceris asparagi
Goldenrod Leaf Miner Beetle 11
Microrhopala vittata
Golden Tortoise Beetle 6
Charidotella sexpunctata
24-spot Ladybird 52
Subcoccinella vigintiquatuorpunctata
Spotted Lady Beetle 53
Coleomegilla maculata
Fifteen-spotted Ladybug 54
Anatis labiculata
LeConte's Giant Ladybeetle 31
Anatis lecontei
Asian Lady Beetle 55
Harmonia axyridis
Convergent Lady Beetle 56
Hippodamia convergens
Parenthesis Lady Beetle 6
Hippodamia parenthesis
Adonis Ladybird 53
Hippodamia variegata
Nine-spotted Ladybug 6
Coccinella novemnotata
Seven-spotted Ladybird 55
Coccinella septempunctata
Transverse Lady Beetle 57
Coccinella transversoguttata
Three-banded Ladybug 6
Coccinella trifasciata
Two-spotted Ladybug 58
Adalia bipunctata
Western Spotless Ladybeetle 46
Cycloneda polita
Spotless Lady Beetle 59
Cycloneda sanguinea
Cream-spotted Ladybird 60
Calvia quatuordecimguttata
Twenty-spotted Lady Beetle 6
Psyllobora vigintimaculata
Red-backed Darkling Beetle 61
Eleodes suturalis
Embaphion muricatum 62
Bothrotes canaliculatus 63
Blue Fungus Beetle 64
Gibbifer californicus
Slender Lizard Beetle 11
Acropteroxys gracilis
Red Flat Bark Beetle 55
Cucujus clavipes
Red-blue Checkered Beetle 17
Trichodes nutalli
Ornate Checkered Beetle 65
Trichodes ornatus
Two-spotted Melyrid 66
Collops bipunctatus
Scarlet Malachite Beetle 43
Malachius aeneus
Strawberry Root Weevil 67
Otiorhynchus ovatus
Green Immigrant Leaf Weevil 68
Polydrusus formosus
Canada Thistle Bud Weevil 69
Larinus carlinae
Stem-boring Weevil 43
Mecinus janthinus
Rose Curculio 70
Merhynchites bicolor
Hollyhock Weevil 68
Rhopalapion longirostre
California Prionus 71
Prionus californicus
Pole Borer 72
Neandra marginicollis
Gnathacmaeops pratensis 73

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

Photo Credits

  • 1. (c) Carolyn Gritzmaker, some rights reserved (CC BY-NC), uploaded by Carolyn Gritzmaker
  • 2. (c) John Baker, some rights reserved (CC BY)
  • 3. (c) USGS Bee Inventory and Monitoring Lab, some rights reserved (CC BY)
  • 4. (c) bathyporeia, some rights reserved (CC BY-NC-ND)
  • 5. (c) Denis Doucet, some rights reserved (CC BY-NC), uploaded by Denis Doucet
  • 6. (c) Jason M Crockwell, some rights reserved (CC BY-NC-ND), uploaded by Jason M Crockwell
  • 7. (c) molanic, some rights reserved (CC BY-NC), uploaded by molanic
  • 8. (c) cotinis, some rights reserved (CC BY-NC-SA)
  • 9. (c) Don Loarie, some rights reserved (CC BY)
  • 10. (c) Jay Smith, some rights reserved (CC BY-NC)
  • 11. (c) Rob Curtis, some rights reserved (CC BY-NC-SA), uploaded by Rob Curtis
  • 12. (c) ninjatomomi, some rights reserved (CC BY-NC), uploaded by ninjatomomi
  • 13. (c) Cécile Bassaglia, some rights reserved (CC BY-NC-SA)
  • 14. (c) Tony Iwane, some rights reserved (CC BY-NC), uploaded by Tony Iwane
  • 15. (c) Leslie Flint, some rights reserved (CC BY-NC), uploaded by Leslie Flint
  • 16. (c) Bruce J. Marlin, some rights reserved (CC BY-SA)
  • 17. (c) psweet, some rights reserved (CC BY-SA), uploaded by psweet
  • 18. (c) Gilles Gonthier, some rights reserved (CC BY)
  • 19. (c) Fritz Geller-Grimm, some rights reserved (CC BY-SA)
  • 20. (c) don5erickson, some rights reserved (CC BY-NC-SA)
  • 21. (c) Eugene Zelenko, some rights reserved (CC BY-SA)
  • 22. (c) Mark Rosenstein, some rights reserved (CC BY-NC-SA), uploaded by Mark Rosenstein
  • 23. (c) Cody Hough, some rights reserved (CC BY-NC)
  • 24. (c) Evan Kane, some rights reserved (CC BY-NC-ND)
  • 25. (c) mtovar, some rights reserved (CC BY-NC)
  • 26. (c) K Schneider, some rights reserved (CC BY-NC)
  • 27. (c) Jenn Forman Orth, some rights reserved (CC BY-NC-SA)
  • 28. (c) Joe Walewski, some rights reserved (CC BY-NC), uploaded by Joe Walewski
  • 29. (c) Danny Barron, some rights reserved (CC BY-NC-ND)
  • 30. (c) A. Jaszlics, some rights reserved (CC BY-NC)
  • 31. (c) Steven Mlodinow, some rights reserved (CC BY-NC), uploaded by Steven Mlodinow
  • 32. (c) Brad Smith, some rights reserved (CC BY-NC)
  • 33. (c) Ted MacRae, some rights reserved (CC BY-NC-ND)
  • 34. (c) Andy Teucher, some rights reserved (CC BY-NC)
  • 35. (c) Sean McCann, some rights reserved (CC BY-NC-SA)
  • 36. (c) Lee Elliott, some rights reserved (CC BY-NC-SA)
  • 37. (c) Patrick Coin, some rights reserved (CC BY-NC-SA)
  • 38. (c) sfbaywalk, some rights reserved (CC BY)
  • 39. (c) Chris Moody, some rights reserved (CC BY-NC-ND)
  • 40. (c) Donald Hobern, some rights reserved (CC BY)
  • 41. (c) ellen hildebrandt, some rights reserved (CC BY-NC), uploaded by ellen hildebrandt
  • 42. (c) Beatriz Moisset, some rights reserved (CC BY-SA)
  • 43. (c) Kerry Matz, some rights reserved (CC BY-NC-SA)
  • 44. (c) Linda Gilbert, some rights reserved (CC BY-NC), uploaded by Linda Gilbert
  • 45. (c) Dendroica cerulea, some rights reserved (CC BY-NC-SA)
  • 46. (c) James Bailey, some rights reserved (CC BY-NC), uploaded by James Bailey
  • 47. (c) Stuart Tingley, some rights reserved (CC BY-NC), uploaded by Stuart Tingley
  • 48. (c) Summit Metro Parks, some rights reserved (CC BY-NC), uploaded by Summit Metro Parks
  • 49. (c) BJ Stacey, some rights reserved (CC BY-NC), uploaded by BJ Stacey
  • 50. (c) Sara Rall, some rights reserved (CC BY-NC), uploaded by Sara Rall
  • 51. (c) Ryan Hodnett, some rights reserved (CC BY-SA)
  • 52. (c) Alejandro Ocampo, some rights reserved (CC BY-NC), uploaded by Alejandro Ocampo
  • 53. (c) cyric, some rights reserved (CC BY-NC-SA), uploaded by cyric
  • 54. (c) Lee Elliott, some rights reserved (CC BY-NC-SA), uploaded by Lee Elliott
  • 55. (c) Katja Schulz, some rights reserved (CC BY)
  • 56. (c) Nature Gardens Gallery Interpreter, some rights reserved (CC BY-NC), uploaded by Nature Gardens Gallery Interpreter
  • 57. (c) Lon&Queta, some rights reserved (CC BY-NC-SA)
  • 58. (c) Grahame, some rights reserved (CC BY-NC-ND), uploaded by Grahame
  • 59. no rights reserved, uploaded by Jesse Rorabaugh
  • 60. (c) Sandy Rae, some rights reserved (CC BY-SA)
  • 61. (c) Tony Palmer, some rights reserved (CC BY-NC), uploaded by Tony Palmer
  • 62. (c) unquenchable.fire, some rights reserved (CC BY-NC-ND)
  • 63. (c) Lena Zappia, some rights reserved (CC BY-NC), uploaded by Lena Zappia
  • 64. (c) Scot Pipkin, some rights reserved (CC BY-NC-SA), uploaded by Scot Pipkin
  • 65. (c) Ken-ichi Ueda, some rights reserved (CC BY)
  • 66. no rights reserved, uploaded by USGS Bee Inventory and Monitoring Lab
  • 67. (c) a_cuell, some rights reserved (CC BY-NC), uploaded by a_cuell
  • 68. (c) Fyn Kynd, some rights reserved (CC BY-SA), uploaded by Fyn Kynd
  • 69. (c) Erik Attaway, some rights reserved (CC BY-NC), uploaded by Erik Attaway
  • 70. (c) Keith Roragen, some rights reserved (CC BY-NC-SA)
  • 71. (c) Peachland Joe, some rights reserved (CC BY-NC-SA)
  • 72. (c) dlbowls, some rights reserved (CC BY-NC), uploaded by dlbowls
  • 73. (c) Matt Bowser, some rights reserved (CC BY), uploaded by Matt Bowser

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