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.

Taxonomy
« Back To Winged and Once-winged Insects Subclass Pterygota
- Flies Order Diptera
  - 24 Brachyceran Flies Suborder Brachycera
  - 1 Nematoceran Flies Suborder Nematocera

Willow Pinecone Gall Midge ¹
Rabdophaga strobiloides

Margined Calligrapher ²
Toxomerus marginatus

Orange-spined Drone Fly ³
Eristalis nemorum

Common Drone Fly ⁴
Eristalis tenax

Striped Bromeliad Fly ⁵
Copestylum vittatum

Thick-legged Hoverfly ⁶
Syritta pipiens

Spiny Tachinid Fly ⁷
Paradejeania rutilioides

Adejeania vexatrix ⁸

Swift Feather-legged Fly ⁹
Trichopoda pennipes

Common Greenbottle Fly ¹⁰
Lucilia sericata

secondary screwworm ¹¹
Cochliomyia macellaria

Yellow Dung Fly ⁶
Scathophaga stercoraria

House Fly ⁶
Musca domestica

Stilt-legged Fly ¹²
Rainieria antennaepes

Micropeza lineata ¹³

Peacock Fly ¹²
Callopistromyia annulipes

Picture-winged Fly ¹⁴
Delphinia picta

Sunflower receptacle maggot ¹⁵
Gymnocarena diffusa

Thistle Stem Gall Fly ¹⁶
Urophora cardui

Sunflower Seed Maggot ¹⁷
Neotephritis finalis

Western Horse Fly ¹⁰
Tabanus punctifer

Cyrtopogon ¹⁸

Lampria bicolor ¹⁹

Chrysanthrax cypris ²⁰

Greater Bee Fly ²¹
Bombylius major

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

Photo Credits

1. (c) Kent McFarland, some rights reserved (CC BY-NC)
2. (c) Denis Doucet, some rights reserved (CC BY-NC), uploaded by Denis Doucet
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20. (c) Royal Tyler, some rights reserved (CC BY-NC-SA), uploaded by Royal Tyler
21. (c) Pascal Gaudette, some rights reserved (CC BY-NC-SA)

Denver-Boulder Metro Area: Bugs

Willow Pinecone Gall Midge 1 Rabdophaga strobiloides

Margined Calligrapher 2 Toxomerus marginatus

Orange-spined Drone Fly 3 Eristalis nemorum

Common Drone Fly 4 Eristalis tenax

Striped Bromeliad Fly 5 Copestylum vittatum

Thick-legged Hoverfly 6 Syritta pipiens

Spiny Tachinid Fly 7 Paradejeania rutilioides

Adejeania vexatrix 8

Swift Feather-legged Fly 9 Trichopoda pennipes

Common Greenbottle Fly 10 Lucilia sericata

secondary screwworm 11 Cochliomyia macellaria

Yellow Dung Fly 6 Scathophaga stercoraria

House Fly 6 Musca domestica

Stilt-legged Fly 12 Rainieria antennaepes

Micropeza lineata 13

Peacock Fly 12 Callopistromyia annulipes

Picture-winged Fly 14 Delphinia picta

Sunflower receptacle maggot 15 Gymnocarena diffusa

Thistle Stem Gall Fly 16 Urophora cardui

Sunflower Seed Maggot 17 Neotephritis finalis

Western Horse Fly 10 Tabanus punctifer

Cyrtopogon 18

Lampria bicolor 19

Chrysanthrax cypris 20

Greater Bee Fly 21 Bombylius major