Wildlife of Boulder County

Boulder County is comprised of 740 square miles of land nestled along the front range of Colorado just 30 miles northwest of Denver. Its proximity to the mountains, diverse landscapes, and various designated open spaces make the county ideal for observing local and even migrating wildlife. ...more ↓

Codling Moth ¹
Cydia pomonella

Western Honey Bee ²
Apis mellifera

Western Tiger Swallowtail ³
Papilio rutulus

Western Black Widow ⁴
Latrodectus hesperus

Polyphemus Moth ⁵
Antheraea polyphemus

Widow Skimmer ⁶
Libellula luctuosa

Common Silverfish ⁷
Lepisma saccharina

Asian Lady Beetle ⁸
Harmonia axyridis

Painted Lady ⁹
Vanessa cardui

Monarch ¹⁰
Danaus plexippus

Wheel Bug ¹¹
Arilus cristatus

Convergent Lady Beetle ¹²
Hippodamia convergens

Red Admiral ¹³
Vanessa atalanta

White-lined Sphinx ¹⁴
Hyles lineata

Blinded Sphinx ¹⁵
Paonias excaecata

Halloween Pennant ¹⁶
Celithemis eponina

Hoary Comma ¹⁷
Polygonia gracilis

Gray Hairstreak ¹⁸
Strymon melinus

Common Checkered-Skipper ¹⁹
Pyrgus communis

Pallid-winged Grasshopper ²⁰
Trimerotropis pallidipennis

Greater Bee Fly ²¹
Bombylius major

Seven-spotted Ladybird ⁸
Coccinella septempunctata

American Rubyspot ²²
Hetaerina americana

Dainty Sulphur ²³
Nathalis iole

Two-spotted Ladybug ²⁴
Adalia bipunctata

Northern Paper Wasp ²⁵
Polistes fuscatus

Agile Long-horned Bee ²⁶
Melissodes agilis

Alfalfa Leafcutter Bee ²⁷
Megachile rotundata

Black Saddlebags ²²
Tramea lacerata

Bald-faced Hornet ²⁸
Dolichovespula maculata

Pearl Crescent ²⁹
Phyciodes tharos

Eastern Boxelder Bug ³⁰
Boisea trivittata

Big-eyed Toad Bug ³¹
Gelastocoris oculatus

Rose Aphid ³²
Macrosiphum rosae

Virile Crayfish ³³
Orconectes virilis

Bold Jumper ³⁴
Phidippus audax

European Mantis ³⁵
Mantis religiosa

Callippe Fritillary
Speyeria callippe

Spotted Cucumber Beetle ³⁶
Diabrotica undecimpunctata

Pale Swallowtail ³⁷
Papilio eurymedon

Large Milkweed Bug ⁸
Oncopeltus fasciatus

Cabbage White ³⁸
Pieris rapae

Drone Fly ³⁹
Eristalis tenax

Western Tent Caterpillar Moth ⁴⁰
Malacosoma californicum

Common Pill-bug ⁴¹
Armadillidium vulgare

Vivid Dancer ⁴²
Argia vivida

Masked Hunter ⁴³
Reduvius personatus

Satyr Comma ⁴⁴
Polygonia satyrus

Harlequin Bug ⁴⁵
Murgantia histrionica

Silvery Blue ⁴⁶
Glaucopsyche lygdamus

Mourning Cloak ⁴⁷
Nymphalis antiopa

Four-spotted Skimmer ⁴⁸
Libellula quadrimaculata

Brilliant Jumper ⁴⁹
Phidippus clarus

Johnson's Jumper ⁵⁰
Phidippus johnsoni

Dreamy Duskywing ⁵¹
Erynnis icelus

Leonard's Skipper ⁵²
Hesperia leonardus

Tawny-edged Skipper ⁵³
Polites themistocles

Dun Skipper ²²
Euphyes vestris

Black Swallowtail ⁵⁴
Papilio polyxenes

Clouded Sulphur ⁵⁵
Colias philodice

Orange Sulphur ⁵⁵
Colias eurytheme

Bronze Copper ⁵⁶
Lycaena hyllus

Aphrodite Fritillary ⁵⁷
Speyeria aphrodite

Viceroy ⁵⁸
Limenitis archippus

Checkered White ¹⁶
Pontia protodice

Large Marble ⁵⁹
Euchloe ausonides

Edited by srupinsky, Melanie Hill, Deborah H Price, and Dave Sutherland, some rights reserved (CC BY-SA)

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Wildlife of Boulder County

Codling Moth 1 Cydia pomonella

Western Honey Bee 2 Apis mellifera

Western Tiger Swallowtail 3 Papilio rutulus

Western Black Widow 4 Latrodectus hesperus

Polyphemus Moth 5 Antheraea polyphemus

Widow Skimmer 6 Libellula luctuosa

Common Silverfish 7 Lepisma saccharina

Asian Lady Beetle 8 Harmonia axyridis

Painted Lady 9 Vanessa cardui

Monarch 10 Danaus plexippus

Wheel Bug 11 Arilus cristatus

Convergent Lady Beetle 12 Hippodamia convergens

Red Admiral 13 Vanessa atalanta

White-lined Sphinx 14 Hyles lineata

Blinded Sphinx 15 Paonias excaecata

Halloween Pennant 16 Celithemis eponina

Hoary Comma 17 Polygonia gracilis

Gray Hairstreak 18 Strymon melinus

Common Checkered-Skipper 19 Pyrgus communis

Pallid-winged Grasshopper 20 Trimerotropis pallidipennis

Greater Bee Fly 21 Bombylius major

Seven-spotted Ladybird 8 Coccinella septempunctata

American Rubyspot 22 Hetaerina americana

Dainty Sulphur 23 Nathalis iole

Two-spotted Ladybug 24 Adalia bipunctata

Northern Paper Wasp 25 Polistes fuscatus

Agile Long-horned Bee 26 Melissodes agilis

Alfalfa Leafcutter Bee 27 Megachile rotundata

Black Saddlebags 22 Tramea lacerata

Bald-faced Hornet 28 Dolichovespula maculata

Pearl Crescent 29 Phyciodes tharos

Eastern Boxelder Bug 30 Boisea trivittata

Big-eyed Toad Bug 31 Gelastocoris oculatus

Rose Aphid 32 Macrosiphum rosae

Virile Crayfish 33 Orconectes virilis

Bold Jumper 34 Phidippus audax

European Mantis 35 Mantis religiosa

Callippe Fritillary Speyeria callippe

Spotted Cucumber Beetle 36 Diabrotica undecimpunctata

Pale Swallowtail 37 Papilio eurymedon

Large Milkweed Bug 8 Oncopeltus fasciatus

Cabbage White 38 Pieris rapae

Drone Fly 39 Eristalis tenax

Western Tent Caterpillar Moth 40 Malacosoma californicum

Common Pill-bug 41 Armadillidium vulgare

Vivid Dancer 42 Argia vivida

Masked Hunter 43 Reduvius personatus

Satyr Comma 44 Polygonia satyrus

Harlequin Bug 45 Murgantia histrionica

Silvery Blue 46 Glaucopsyche lygdamus

Mourning Cloak 47 Nymphalis antiopa

Four-spotted Skimmer 48 Libellula quadrimaculata

Brilliant Jumper 49 Phidippus clarus

Johnson's Jumper 50 Phidippus johnsoni

Dreamy Duskywing 51 Erynnis icelus

Leonard's Skipper 52 Hesperia leonardus

Tawny-edged Skipper 53 Polites themistocles

Dun Skipper 22 Euphyes vestris

Black Swallowtail 54 Papilio polyxenes

Clouded Sulphur 55 Colias philodice

Orange Sulphur 55 Colias eurytheme

Bronze Copper 56 Lycaena hyllus

Aphrodite Fritillary 57 Speyeria aphrodite

Viceroy 58 Limenitis archippus

Checkered White 16 Pontia protodice

Large Marble 59 Euchloe ausonides