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.

Anastrangalia sanguinea ¹

Red-shouldered Pine Borer ²
Stictoleptura canadensis

Eastern Elderberry Borer ³
Desmocerus palliatus

Blackhorned Pine Borer ⁴
Callidium antennatum

Locust Borer Beetle ⁵
Megacyllene robiniae

Longhorned Beetle ⁶
Batyle suturalis

Tragidion coquus ⁷

Tragidion densiventre ⁸

Neospondylis upiformis ⁹

White-spotted Sawyer ¹⁰
Monochamus scutellatus

Leafy spurge stem boring beetle ¹¹
Oberea erythrocephala

Milkweed Borer ¹²
Tetraopes femoratus

Red Milkweed Beetle ¹³
Tetraopes tetrophthalmus

Golden Net-winged Beetle ¹⁴
Dictyoptera aurora

Cantharis pallida ¹⁵

Colorado Soldier Beetle ¹⁶
Chauliognathus basalis

Chauliognathus deceptus ¹⁷

Eastern Eyed Click Beetle ¹⁸
Alaus oculatus

Western Sculptured Pine Borer ¹⁹
Chalcophora angulicollis

Buprestis confluenta ²⁰

Emerald Ash Borer ²¹
Agrilus planipennis

gold-and-brown rove beetle ²²
Ontholestes cingulatus

Hairy Rove Beetle ²³
Creophilus maxillosus

Yellow-bellied Burying Beetle ²⁴
Nicrophorus guttula

Banded Sexton Beetle ²⁵
Nicrophorus investigator

Margined Burying Beetle ²⁶
Nicrophorus marginatus

Tomentose Burying Beetle ²⁷
Nicrophorus tomentosus

Garden Carrion Beetle ²⁸
Heterosilpha ramosa

Northern Carrion Beetle ²⁴
Thanatophilus lapponicus

Emerald Euphoria ²⁹
Euphoria fulgida

Bumble Flower Beetle ³⁰
Euphoria inda

Ten-lined June Beetle ³¹
Polyphylla decemlineata

brown scarab beetle ³²
Phyllophaga lanceolata

Japanese Beetle ³³
Popillia japonica

Maculated Dung Beetle ³⁴
Aphodius distinctus

Cottonwood Stag Beetle ³⁵
Lucanus mazama

Widespread Snowfly ³⁶
Capnia confusa

Vernal Snowfly ³⁷
Capnia vernalis

Colorado Forestfly ³⁸
Malenka coloradensis

Banded Forestfly ³⁶
Prostoia besametsa

Rough Sallfly ³⁷
Triznaka pintada

Thermometer Cricket ³⁹
Oecanthus fultoni

Fork-tailed Bush Katydid ⁴⁰
Scudderia furcata

Greater Anglewing ⁴¹
Microcentrum rhombifolium

Mormon Cricket ⁴²
Anabrus simplex

Orange-winged Grasshopper ⁴³
Arphia conspersa

Red-winged Grasshopper ⁴⁴
Arphia pseudonietana

Green-striped Grasshopper ²²
Chortophaga viridifasciata

Wrinkled Grasshopper ⁴⁵
Hippiscus ocelote

Coral-winged Grasshopper ⁴⁶
Pardalophora apiculata

Wrangler Grasshopper ⁴³
Circotettix rabula

Pallid-winged Grasshopper ⁴⁷
Trimerotropis pallidipennis

Carolina Grasshopper ⁴⁸
Dissosteira carolina

Velvet-striped Grasshopper ⁴⁹
Eritettix simplex

Rainbow Grasshopper ⁵⁰
Dactylotum bicolor

Snakeweed Grasshopper ⁴⁴
Hesperotettix viridis

Differential Grasshopper ⁵¹
Melanoplus differentialis

Lakin Grasshopper ⁴⁶
Melanoplus lakinus

Two-striped Grasshopper ⁵²
Melanoplus bivittatus

Red-legged Grasshopper ²
Melanoplus femurrubrum

Plains Lubber Grasshopper ⁵³
Brachystola magna

Graphocephala hieroglyphica ⁵⁴

Cuerna alpina ¹⁹

Putnam's Cicada ⁴⁶
Platypedia putnami

Meadow Spittlebug ⁵⁵
Philaenus spumarius

Potato Psyllid ⁵⁶
Bactericera cockerelli

Cochineal Bug ⁵⁷
Dactylopius coccus

Oleander Aphid ⁵⁸
Aphis nerii

Rose Aphid ⁵⁹
Macrosiphum rosae

Big-eyed Toad Bug ⁶⁰
Gelastocoris oculatus

Notonecta ⁶¹

Spined Assassin Bug ⁶²
Sinea diadema

Pale Green Assassin Bug ⁶³
Zelus luridus

Wheel Bug ⁶⁴
Arilus cristatus

Rhynocoris ventralis ⁶⁵

Bee Assassin ⁶⁶
Apiomerus spissipes

Masked Hunter ⁶⁷
Reduvius personatus

Red-spotted Aster Mirid ⁶⁸
Polymerus basalis

Tarnished Plant Bug ⁶⁹
Lygus lineolaris

Common Bed Bug ⁷⁰
Cimex lectularius

Common Water Strider ⁷¹
Aquarius remigis

Sphragisticus nebulosus ⁷²

Charcoal Seed Bug ⁶⁹
Melacoryphus lateralis

Large Milkweed Bug ⁶⁹
Oncopeltus fasciatus

False Milkweed Bug ⁷³
Lygaeus turcicus

Small Milkweed Bug ⁷⁴
Lygaeus kalmii

Blue Shieldbug ⁷⁵
Zicrona caerulea

Two-spotted Stink Bug ⁷⁶
Perillus bioculatus

Perillus exaptus ³²

Holcostethus limbolarius ⁷⁷

Brown Stink Bug ⁶⁸
Euschistus servus

Twice-Stabbed Stink Bug ²
Cosmopepla lintneriana

Brown Marmorated Stink Bug ³³
Halyomorpha halys

Harlequin Bug ⁷⁸
Murgantia histrionica

Green Stink Bug ⁶²
Chinavia hilaris

Say's Stink Bug ⁷⁹
Chlorochroa sayi

Western Leaf-footed Bug ⁸⁰
Leptoglossus clypealis

Western Conifer Seed Bug ⁸¹
Leptoglossus occidentalis

Cactus Coreid ⁶⁹
Chelinidea vittiger

Squash Bug ⁸²
Anasa tristis

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

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Denver-Boulder Metro Area: Bugs

Red-shouldered Pine Borer 2 Stictoleptura canadensis

Eastern Elderberry Borer 3 Desmocerus palliatus

Blackhorned Pine Borer 4 Callidium antennatum

Locust Borer Beetle 5 Megacyllene robiniae

Longhorned Beetle 6 Batyle suturalis

White-spotted Sawyer 10 Monochamus scutellatus

Leafy spurge stem boring beetle 11 Oberea erythrocephala

Milkweed Borer 12 Tetraopes femoratus

Red Milkweed Beetle 13 Tetraopes tetrophthalmus

Golden Net-winged Beetle 14 Dictyoptera aurora

Colorado Soldier Beetle 16 Chauliognathus basalis

Eastern Eyed Click Beetle 18 Alaus oculatus

Western Sculptured Pine Borer 19 Chalcophora angulicollis

Emerald Ash Borer 21 Agrilus planipennis

gold-and-brown rove beetle 22 Ontholestes cingulatus

Hairy Rove Beetle 23 Creophilus maxillosus

Yellow-bellied Burying Beetle 24 Nicrophorus guttula

Banded Sexton Beetle 25 Nicrophorus investigator

Margined Burying Beetle 26 Nicrophorus marginatus

Tomentose Burying Beetle 27 Nicrophorus tomentosus

Garden Carrion Beetle 28 Heterosilpha ramosa

Northern Carrion Beetle 24 Thanatophilus lapponicus

Emerald Euphoria 29 Euphoria fulgida

Bumble Flower Beetle 30 Euphoria inda

Ten-lined June Beetle 31 Polyphylla decemlineata

brown scarab beetle 32 Phyllophaga lanceolata

Japanese Beetle 33 Popillia japonica

Maculated Dung Beetle 34 Aphodius distinctus

Cottonwood Stag Beetle 35 Lucanus mazama

Widespread Snowfly 36 Capnia confusa

Vernal Snowfly 37 Capnia vernalis

Colorado Forestfly 38 Malenka coloradensis

Banded Forestfly 36 Prostoia besametsa

Rough Sallfly 37 Triznaka pintada

Thermometer Cricket 39 Oecanthus fultoni

Fork-tailed Bush Katydid 40 Scudderia furcata

Greater Anglewing 41 Microcentrum rhombifolium

Mormon Cricket 42 Anabrus simplex

Orange-winged Grasshopper 43 Arphia conspersa

Red-winged Grasshopper 44 Arphia pseudonietana

Green-striped Grasshopper 22 Chortophaga viridifasciata

Wrinkled Grasshopper 45 Hippiscus ocelote

Coral-winged Grasshopper 46 Pardalophora apiculata

Wrangler Grasshopper 43 Circotettix rabula

Pallid-winged Grasshopper 47 Trimerotropis pallidipennis

Carolina Grasshopper 48 Dissosteira carolina

Velvet-striped Grasshopper 49 Eritettix simplex

Rainbow Grasshopper 50 Dactylotum bicolor

Snakeweed Grasshopper 44 Hesperotettix viridis

Differential Grasshopper 51 Melanoplus differentialis

Lakin Grasshopper 46 Melanoplus lakinus

Two-striped Grasshopper 52 Melanoplus bivittatus

Red-legged Grasshopper 2 Melanoplus femurrubrum

Plains Lubber Grasshopper 53 Brachystola magna

Putnam's Cicada 46 Platypedia putnami

Meadow Spittlebug 55 Philaenus spumarius

Potato Psyllid 56 Bactericera cockerelli

Cochineal Bug 57 Dactylopius coccus

Oleander Aphid 58 Aphis nerii

Rose Aphid 59 Macrosiphum rosae

Big-eyed Toad Bug 60 Gelastocoris oculatus

Spined Assassin Bug 62 Sinea diadema

Pale Green Assassin Bug 63 Zelus luridus

Wheel Bug 64 Arilus cristatus

Bee Assassin 66 Apiomerus spissipes

Masked Hunter 67 Reduvius personatus

Red-spotted Aster Mirid 68 Polymerus basalis

Tarnished Plant Bug 69 Lygus lineolaris

Common Bed Bug 70 Cimex lectularius

Common Water Strider 71 Aquarius remigis

Charcoal Seed Bug 69 Melacoryphus lateralis

Large Milkweed Bug 69 Oncopeltus fasciatus

False Milkweed Bug 73 Lygaeus turcicus

Small Milkweed Bug 74 Lygaeus kalmii

Blue Shieldbug 75 Zicrona caerulea

Two-spotted Stink Bug 76 Perillus bioculatus

Brown Stink Bug 68 Euschistus servus

Twice-Stabbed Stink Bug 2 Cosmopepla lintneriana

Brown Marmorated Stink Bug 33 Halyomorpha halys