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 ↓

poison hemlock ¹
Conium maculatum

Solomon's-plume ²
Maianthemum racemosum amplexicaule

field bindweed ³
Convolvulus arvensis

giant ragweed ⁴
Ambrosia trifida

prickly lettuce ⁵
Lactuca serriola

skunkweed Jacob's-ladder ⁶
Polemonium pulcherrimum delicatum

Eastern Boxelder Bug ⁷
Boisea trivittata

Fendler's Meadow-rue ⁸
Thalictrum fendleri

Common Mouse-ear Chickweed ⁹
Cerastium fontanum

beaked hazelnut ¹⁰
Corylus cornuta

Big-eyed Toad Bug ¹¹
Gelastocoris oculatus

false boneset ¹²
Brickellia eupatorioides

Rose Aphid ¹³
Macrosiphum rosae

Virile Crayfish ¹⁴
Orconectes virilis

Bold Jumper ¹⁵
Phidippus audax

European Mantis ¹⁶
Mantis religiosa

European Carp ¹⁷
Cyprinus carpio

yellow salsify ¹⁸
Tragopogon dubius

Callippe Fritillary
Speyeria callippe

feverfew ¹⁹
Tanacetum parthenium

Stinkhorn ²⁰
Phallus impudicus

white horehound ²¹
Marrubium vulgare

silver maple ²²
Acer saccharinum

smooth sumac ²³
Rhus glabra

Chokecherry ²⁴
Prunus virginiana

trembling aspen ²⁵
Populus tremuloides

Spotted Cucumber Beetle ²⁶
Diabrotica undecimpunctata

Pale Swallowtail ²⁷
Papilio eurymedon

golden currant ²⁸
Ribes aureum

Large Milkweed Bug ²⁹
Oncopeltus fasciatus

bittersweet ³⁰
Solanum dulcamara

Cabbage White ³¹
Pieris rapae

common bird's-foot trefoil
Lotus corniculatus corniculatus

Drone Fly ³²
Eristalis tenax

white clover ³³
Trifolium repens

common ivy ³⁴
Hedera helix

Western Tent Caterpillar Moth ³⁵
Malacosoma californicum

tansy ²⁴
Tanacetum vulgare

Fuller's teasel ³⁶
Dipsacus fullonum

oxeye daisy ¹⁹
Leucanthemum vulgare

Common Pill-bug ³⁷
Armadillidium vulgare

alpine leafybract aster ³⁸
Symphyotrichum foliaceum

common soapwort ¹⁹
Saponaria officinalis

Common Mallow ³⁹
Malva sylvestris

spotted lady's thumb ⁴⁰
Persicaria maculosa

Vivid Dancer ⁴¹
Argia vivida

mica cap ⁴²
Coprinellus micaceus

monument plant ⁴³
Frasera speciosa

Felwort ⁴⁴
Swertia perennis

Masked Hunter ⁴⁵
Reduvius personatus

Satyr Comma ⁴⁶
Polygonia satyrus

Harlequin Bug ⁴⁷
Murgantia histrionica

Silvery Blue ⁴⁸
Glaucopsyche lygdamus

Mourning Cloak ⁴⁹
Nymphalis antiopa

tumble mustard ⁵⁰
Sisymbrium altissimum

alfalfa ²⁵
Medicago sativa

ribbed melilot ⁵¹
Melilotus officinalis

Four-spotted Skimmer ⁵²
Libellula quadrimaculata

hedge bindweed ⁵³
Calystegia sepium

western blue flag ⁵⁴
Iris missouriensis

red-berried elder ⁵⁵
Sambucus racemosa

tumbleweed ⁵⁶
Salsola tragus

Rubber Rabbitbrush ²⁵
Ericameria nauseosa nauseosa

rubber rabbitbrush ²⁵
Ericameria nauseosa

Common sunflower ⁵⁷
Helianthus annuus

Western Spotted Skunk
Spilogale gracilis

Brilliant Jumper ⁵⁸
Phidippus clarus

Johnson's Jumper ⁵⁹
Phidippus johnsoni

Dreamy Duskywing ⁶⁰
Erynnis icelus

Leonard's Skipper ⁶¹
Hesperia leonardus

Tawny-edged Skipper ⁶²
Polites themistocles

Dun Skipper ⁶³
Euphyes vestris

Black Swallowtail ⁶⁴
Papilio polyxenes

Clouded Sulphur ⁶⁵
Colias philodice

Orange Sulphur ⁶⁵
Colias eurytheme

Bronze Copper ⁶⁶
Lycaena hyllus

Aphrodite Fritillary ⁶⁷
Speyeria aphrodite

Viceroy ⁶⁸
Limenitis archippus

Green Sunfish ⁶⁹
Lepomis cyanellus

Black Knot ⁷⁰
Apiosporina morbosa

common juniper ⁷¹
Juniperus communis

poison ivy ⁷²
Toxicodendron radicans

fragrant sumac ²⁴
Rhus aromatica

sand cherry ⁷³
Prunus pumila

spotted spurge ⁷⁴
Euphorbia maculata

white melilot ⁵¹
Melilotus albus

greater plantain ⁷⁵
Plantago major

Common purslane ⁷⁶
Portulaca oleracea

western virgin's bower ⁷⁷
Clematis ligusticifolia

narrowleaf willow ²⁵
Salix exigua

moth mullein ²⁵
Verbascum blattaria

great mullein ⁵¹
Verbascum thapsus

Meadow Deathcamas ⁷⁸
Toxicoscordion venenosum

Western Mosquitofish ⁷⁹
Gambusia affinis

Checkered White ⁸⁰
Pontia protodice

Large Marble ⁸¹
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

poison hemlock 1 Conium maculatum

Solomon's-plume 2 Maianthemum racemosum amplexicaule

field bindweed 3 Convolvulus arvensis

giant ragweed 4 Ambrosia trifida

prickly lettuce 5 Lactuca serriola

skunkweed Jacob's-ladder 6 Polemonium pulcherrimum delicatum

Eastern Boxelder Bug 7 Boisea trivittata

Fendler's Meadow-rue 8 Thalictrum fendleri

Common Mouse-ear Chickweed 9 Cerastium fontanum

beaked hazelnut 10 Corylus cornuta

Big-eyed Toad Bug 11 Gelastocoris oculatus

false boneset 12 Brickellia eupatorioides

Rose Aphid 13 Macrosiphum rosae

Virile Crayfish 14 Orconectes virilis

Bold Jumper 15 Phidippus audax

European Mantis 16 Mantis religiosa

European Carp 17 Cyprinus carpio

yellow salsify 18 Tragopogon dubius

Callippe Fritillary Speyeria callippe

feverfew 19 Tanacetum parthenium

Stinkhorn 20 Phallus impudicus

white horehound 21 Marrubium vulgare

silver maple 22 Acer saccharinum

smooth sumac 23 Rhus glabra

Chokecherry 24 Prunus virginiana

trembling aspen 25 Populus tremuloides

Spotted Cucumber Beetle 26 Diabrotica undecimpunctata

Pale Swallowtail 27 Papilio eurymedon

golden currant 28 Ribes aureum

Large Milkweed Bug 29 Oncopeltus fasciatus

bittersweet 30 Solanum dulcamara

Cabbage White 31 Pieris rapae

common bird's-foot trefoil Lotus corniculatus corniculatus

Drone Fly 32 Eristalis tenax

white clover 33 Trifolium repens

common ivy 34 Hedera helix

Western Tent Caterpillar Moth 35 Malacosoma californicum

tansy 24 Tanacetum vulgare

Fuller's teasel 36 Dipsacus fullonum

oxeye daisy 19 Leucanthemum vulgare

Common Pill-bug 37 Armadillidium vulgare

alpine leafybract aster 38 Symphyotrichum foliaceum

common soapwort 19 Saponaria officinalis

Common Mallow 39 Malva sylvestris

spotted lady's thumb 40 Persicaria maculosa

Vivid Dancer 41 Argia vivida

mica cap 42 Coprinellus micaceus

monument plant 43 Frasera speciosa

Felwort 44 Swertia perennis

Masked Hunter 45 Reduvius personatus

Satyr Comma 46 Polygonia satyrus

Harlequin Bug 47 Murgantia histrionica

Silvery Blue 48 Glaucopsyche lygdamus

Mourning Cloak 49 Nymphalis antiopa

tumble mustard 50 Sisymbrium altissimum

alfalfa 25 Medicago sativa

ribbed melilot 51 Melilotus officinalis

Four-spotted Skimmer 52 Libellula quadrimaculata

hedge bindweed 53 Calystegia sepium

western blue flag 54 Iris missouriensis

red-berried elder 55 Sambucus racemosa

tumbleweed 56 Salsola tragus

Rubber Rabbitbrush 25 Ericameria nauseosa nauseosa

rubber rabbitbrush 25 Ericameria nauseosa

Common sunflower 57 Helianthus annuus

Western Spotted Skunk Spilogale gracilis

Brilliant Jumper 58 Phidippus clarus

Johnson's Jumper 59 Phidippus johnsoni

Dreamy Duskywing 60 Erynnis icelus

Leonard's Skipper 61 Hesperia leonardus

Tawny-edged Skipper 62 Polites themistocles

Dun Skipper 63 Euphyes vestris

Black Swallowtail 64 Papilio polyxenes

Clouded Sulphur 65 Colias philodice

Orange Sulphur 65 Colias eurytheme

Bronze Copper 66 Lycaena hyllus

Aphrodite Fritillary 67 Speyeria aphrodite

Viceroy 68 Limenitis archippus

Green Sunfish 69 Lepomis cyanellus