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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.

Maple Erineum Mite 1
Aceria calaceris
Witches Broom of Hackberry Mite 2
Aceria celtis
Ash Bead Gall Mite 3
Aceria fraxini
box elder pouch gall mite 1
Aceria negundi
Poplar Budgall Mite 4
Aceria parapopuli
Aceria trichophila 5
Slender Lizard Beetle 6
Acropteroxys gracilis
Northern Orbweaver 7
Aculepeira packardi
Poison Ivy Leaf Mite 8
Aculops rhois
Willow Bead Gall Mite 9
Aculus tetanothrix
Two-spotted Ladybug 10
Adalia bipunctata
Adejeania vexatrix 11
Lance-tipped Darner 12
Aeshna constricta
Variable Darner 13
Aeshna interrupta
Paddle-tailed Darner 13
Aeshna palmata
Shadow Darner 14
Aeshna umbrosa
Bicolored Striped Sweat Bee 15
Agapostemon virescens
Pennsylvania Grass Spider 16
Agelenopsis pennsylvanica
Emerald Ash Borer 17
Agrilus planipennis
Eastern Eyed Click Beetle 18
Alaus oculatus
Black Laceweaver 19
Amaurobius ferox
Ammophila ferruginosa 20
Western Red Damsel 21
Amphiagrion abbreviatum
Mormon Cricket 22
Anabrus simplex
Squash Bug 23
Anasa tristis
Anastrangalia sanguinea 24
Fifteen-spotted Ladybug 23
Anatis labiculata
LeConte's Giant Ladybeetle 25
Anatis lecontei
Common Green Darner 13
Anax junius
Andrena 26
European Wool Carder Bee 6
Anthidium manicatum
Bumble-bee-mimic Digger Bee 27
Anthophora bomboides
Oleander Aphid 28
Aphis nerii
Maculated Dung Beetle 29
Aphodius distinctus
Bee Assassin 30
Apiomerus spissipes
Western Honey Bee 31
Apis mellifera
Common Water Strider 14
Aquarius remigis
Gem-shaped Orbweaver 32
Araneus gemma
Cat-faced Orb-Weaver 33
Araneus gemmoides
Shamrock Orbweaver 34
Araneus trifolium
Six-spotted Orbweaver 35
Araniella displicata
Great Spreadwing 13
Archilestes grandis
Vivid Dancer 36
Argia vivida
Yellow Garden Spider 37
Argiope aurantia
Banded Garden Spider 38
Argiope trifasciata
Wheel Bug 39
Arilus cristatus
Common Pill-bug 40
Armadillidium vulgare
Orange-winged Grasshopper 41
Arphia conspersa
Red-winged Grasshopper 42
Arphia pseudonietana
Attinella dorsata 43
Attulus ammophilus 44
Asiatic Wall Jumping Spider 45
Attulus fasciger
Flower Jumping Spider 46
Attulus floricola
Golden Sweat Bee 46
Augochlorella aurata
Green Metallic Sweat Bee 47
Augochloropsis metallica
Potato Psyllid 48
Bactericera cockerelli
Iron Blue Dun 49
Baetis bicaudatus
Multicolored Bark Crab Spider 50
Bassaniana versicolor
Longhorned Beetle 51
Batyle suturalis
Four-banded Stink Bug Hunter Wasp 52
Bicyrtes quadrifasciatus
Sumac Flea Beetle 53
Blepharida rhois
Western Boxelder Bug 54
Boisea rubrolineata
Eastern Boxelder Bug 55
Boisea trivittata
White-Shouldered Bumble Bee 56
Bombus appositus
Black-and-gold Bumble Bee 57
Bombus auricomus
High Country Bumble Bee 58
Bombus balteatus
Black-notched Bumble Bee 59
Bombus bifarius
Golden Northern Bumble Bee 60
Bombus fervidus
Brown-belted Bumble Bee 61
Bombus griseocollis
Hunt's Bumble Bee 61
Bombus huntii
Morrison's Bumble Bee 62
Bombus morrisoni
Nevada Bumble Bee 63
Bombus nevadensis
Western Bumble Bee 64
Bombus occidentalis
American Bumble Bee 65
Bombus pensylvanicus
Red-belted Bumble Bee 66
Bombus rufocinctus
Forest Bumble Bee 67
Bombus sylvicola
Greater Bee Fly 68
Bombylius major
Bothrotes canaliculatus 69
Plains Lubber Grasshopper 70
Brachystola magna
Buprestis confluenta 71
Speckled Wing Dun 72
Callibaetis ferrugineus hageni
Blackhorned Pine Borer 73
Callidium antennatum
Peacock Fly 74
Callopistromyia annulipes
Ebony Jewelwing 75
Calopteryx maculata
Flower Jumping Spider 46
Calositticus floricola
Cream-spotted Ladybird 76
Calvia quatuordecimguttata
Western Carpenter Ant 77
Camponotus modoc
Bicolored Carpenter Ant 24
Camponotus vicinus
Cantharis pallida 78
Widespread Snowfly 79
Capnia confusa
Vernal Snowfly 80
Capnia vernalis
Wood Ground-beetle 81
Carabus nemoralis
Castianeira alteranda 25
Red-spotted Ant-mimic Sac Spider 82
Castianeira descripta
Long-palped Ant-mimic Sac Spider 83
Castianeira longipalpa
Calico Pennant 84
Celithemis elisa
Halloween Pennant 85
Celithemis eponina
Thick-headed Dwarf Weaver 86
Ceraticelus crassiceps
Western Sculptured Pine Borer 87
Chalcophora angulicollis
Blue Mud Dauber 88
Chalybion californicum

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

Photo Credits

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  • 2. (c) matthew_wills, some rights reserved (CC BY-NC), uploaded by matthew_wills
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  • 26. (c) Cécile Bassaglia, some rights reserved (CC BY-NC-SA)
  • 27. (c) USGS Native Bee Inventory and Monitoring Laboratory, some rights reserved (CC BY)
  • 28. (c) Eran Finkle, some rights reserved (CC BY)
  • 29. (c) Stanislav Krejčík, some rights reserved (CC BY)
  • 30. (c) Samuel Huckins, some rights reserved (CC BY-NC-SA)
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  • 43. (c) Tobi (he/him), some rights reserved (CC BY), uploaded by Tobi (he/him)
  • 44. (c) calebcam, some rights reserved (CC BY-NC), uploaded by calebcam
  • 45. no rights reserved, uploaded by Zygy
  • 46. (c) Denis Doucet, some rights reserved (CC BY-NC), uploaded by Denis Doucet
  • 47. (c) Jason M Crockwell, some rights reserved (CC BY-NC-ND), uploaded by Jason M Crockwell
  • 48. (c) Andrew Jensen, some rights reserved (CC BY-NC-SA)
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  • 50. (c) John P Friel, some rights reserved (CC BY), uploaded by John P Friel
  • 51. (c) Victor W Fazio III, some rights reserved (CC BY-NC), uploaded by Victor W Fazio III
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  • 57. (c) Mark Nofsinger, some rights reserved (CC BY-NC), uploaded by Mark Nofsinger
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  • 59. (c) Sean McCann, some rights reserved (CC BY-NC-SA)
  • 60. (c) John Baker, some rights reserved (CC BY)
  • 61. no rights reserved, uploaded by USGS Bee Inventory and Monitoring Lab
  • 62. (c) Liam O'Brien, some rights reserved (CC BY-NC), uploaded by Liam O'Brien
  • 63. (c) Steve Wells, some rights reserved (CC BY-NC), uploaded by Steve Wells
  • 64. (c) USGS Bee Inventory and Monitoring Lab, some rights reserved (CC BY)
  • 65. (c) Carolyn Gritzmaker, some rights reserved (CC BY-NC), uploaded by Carolyn Gritzmaker
  • 66. (c) James Bailey, some rights reserved (CC BY-NC), uploaded by James Bailey
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  • 79. (c) Colorado Parks and Wildlife, all rights reserved, uploaded by Colorado Parks and Wildlife
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  • 84. (c) Diana-Terry Hibbitts, some rights reserved (CC BY-NC), uploaded by Diana-Terry Hibbitts
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  • 87. (c) Damon Tighe, some rights reserved (CC BY-NC), uploaded by Damon Tighe
  • 88. (c) Jimmy Smith, some rights reserved (CC BY-NC-ND)

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