Insects and Arachnids of Chatfield State Park

Chatfield reservoir is one of the largest bodies of water along the Front Range open to public recreation. The park offers water enthusiasts the opportunity to enjoy fishing, boating, sailing, water-skiing, and swimming in the 1,500 surface acre reservoir. Nearly 3,900 acres of park land ...more ↓

White-shouldered Bumble Bee

Bombus appositus is a species of bumblebee known commonly as the white-shouldered bumblebee. It is native to western North America, including western Canada and the western United States.

Nevada Bumble Bee

Bombus nevadensis, the Nevada bumblebee, is a species of bumblebee. It is native to North America, where it occurs from Alaska to California in the west, and east to Wisconsin, and in Arizona, New Mexico, and Mexico.

Brown-belted Bumble Bee

Bombus griseocollis is a species of bumblebee known commonly as the brown-belted bumblebee. It is native to much of the United States except for the Southwest, and to the southernmost regions of several of the provinces of Canada.

Hunt's Bumble Bee

Bombus huntii is a species of bumblebee. It is native to western North America, where it occurs in western Canada and the United States as far east as Manitoba and Minnesota, and in Mexico as far south as the Trans-Mexican Volcanic Belt. It is known commonly as the Hunt bumblebee or Hunt's bumblebee.

American Bumble Bee

Bombus pensylvanicus, the American bumblebee or Sonoran bumblebee, is a threatened species of bumblebee native to North America. It occurs in eastern Canada, throughout much of the United States, and much of Mexico.

Western Honey Bee

The western honey bee or European honey bee (Apis mellifera) is the most common of the 7–12 species of honey bee worldwide. The genus name Apis is Latin for "bee", and mellifera is the Latin for "honey-bearing", referring to the species' production of honey for the winter.

Golden Sweat Bee

Augochlorella aurata is a species of sweat bee in the family Halictidae.

Bicolored Striped Sweat Bee

Agapostemon virescens, the bicolored striped-sweat bee, is a species of sweat bee in the family Halictidae. It is found in North America.

European Woolcarder Bee

Anthidium manicatum, commonly called the European wool carder bee, is a species of bee in the family Megachilidae, the leaf-cutter bees or mason bees.

Parallel Leafcutter Bee

Megachile parallela is a species of bee in the family Megachilidae. It was described by Smith in 1853.

Milwaukee Mining Bee

Andrena milwaukeensis, the Milwaukee andrena, is a species of mining bee in the family Andrenidae. It is found in North America.

Pseudomasaris vespoides

Pseudomasaris vespoides is a species of pollen wasp in the family Vespidae.

European Paper Wasp

The European paper wasp (Polistes dominula, often misspelled as dominulus) is one of the most common and well-known species of social wasps in the genus Polistes. Its diet is more diverse than that of most Polistes species (many genera of insects versus mainly caterpillars in other Polistes), giving it superior survival value over many other wasp ...more ↓

Golden Paper Wasp

Polistes aurifer, the golden paper wasp, is a species of paper wasp in the family Vespidae.

Long-tailed Giant Ichneumonid Wasp

Megarhyssa macrurus (common name giant ichneumon wasp), is a species of large ichneumon wasp.

Big Sand Tiger Beetle

Cicindela formosa, the big sand tiger beetle, is a species of flashy tiger beetle in the family Carabidae. It is found in North America.

Purple Tiger Beetle

Cicindela purpurea, known generally as the purple tiger beetle or cow path tiger beetle, is a species of flashy tiger beetle in the family Carabidae. It is found in North America.

Festive Tiger Beetle

Cicindela scutellaris, the festive tiger beetle, is a species of flashy tiger beetle in the family Carabidae. It is found in North America.

California Warrior Beetle

Pasimachus californicus is a species of ground beetle in the family Carabidae. It is found in Central America and North America.

Pasimachus elongatus

Pasimachus elongatus is a species of ground beetle in the family Carabidae. It is found in Central America and North America.

Green Dock Beetle

Gastrophysa viridula, known as the green dock beetle, green dock leaf beetle or green sorrel beetle, is a species of beetle native to Europe.

Spotted Cucumber Beetle

The spotted cucumber beetle (Diabrotica undecimpunctata) is a beetle native to North America. The beetle is also a major agricultural pest insect of North America (see also cucumber beetle).

Goldenrod Leaf Beetle

Trirhabda canadensis, the goldenrod leaf beetle, is a species of leaf beetle in the family Chrysomelidae. It is found in North America.

Rabbitbrush Beetle

Trirhabda nitidicollis is a species of leaf beetle in the family Chrysomelidae. It is found in North America.

Dogbane Leaf Beetle

Chrysochus auratus, the dogbane beetle, of eastern North America, is a member of the insect subfamily Eumolpinae. It is primarily found east of the Rocky Mountains. One of the brightest in its family, it is iridescent blue-green with a metallic copper, golden or crimson shine. Its diet consists of dogbane and milkweed. It measures between 8 and 11 mm (less than 0.5 ...more ↓

Argus Tortoise Beetle

Chelymorpha cassidea, known generally as the Argus tortoise beetle or milkweed tortoise beetle, is a species of leaf beetle in the family Chrysomelidae. It is found in the Caribbean and North America.

Asian Lady Beetle

Harmonia axyridis, most commonly known as the harlequin, multicolored Asian, or simply Asian ladybeetle, is a large coccinellid beetle. This is one of the most variable species in the world, with an exceptionally wide range of color forms. It is native to eastern Asia, but has been artificially introduced to North America and Europe to control aphids and ...more ↓

Convergent Ladybeetle

Hippodamia convergens, commonly known as the convergent lady beetle, is one of the most common lady beetles in North America and is found throughout the continent. Aphids form their main diet and they are used for the biological control of these pests.

Seven-spotted Ladybird

Coccinella septempunctata, the seven-spot ladybird (or, in North America, seven-spotted ladybug or "C-7"), is the most common ladybird in Europe. Its elytra are of a red colour, but punctuated with three black spots each, with one further spot being spread over the junction of the two, making a total of seven spots, from which the species derives both its ...more ↓

Red-backed Darkling Beetle

Eleodes suturalis, or the red-backed darkling beetle is a species of darkling beetle in the genus Eleodes. Their known range extends from South Dakota to Texas, and are not known to exist west of the Rocky Mountains. They can be easily identified by the distinctive red stripe which goes down the center of their decently flat elytra.

Blue Fungus Beetle

Cypherotylus californicus, sometimes known as the blue fungus beetle or blue pleasing fungus beetle, is a species of pleasing fungus beetle in the family Erotylidae. It is recorded from Wyoming, Colorado, New Mexico, Arizona, California, Kansas, and the Mexican state of Sonora.

leaf weevil

Polydrusus impressifrons, known generally as the pale green weevil or leaf weevil, is a species of broad-nosed weevil in the family of beetles known as Curculionidae. It is found in North America.

Knapweed Root Weevil

Cyphocleonus achates is a species of true weevil known as the knapweed root weevil. It is native to southern Europe and the Mediterranean and is used as an agent of biological pest control against noxious knapweeds, especially spotted knapweed (Centaurea maculosa).

Batyle suturalis

Batyle suturalis is a species of beetle in the Cerambycidae family. It was described by Thomas Say in 1824.

Red-femured Milkweed Borer

Tetraopes femoratus is a species of beetle in the family Cerambycidae. It was described by LeConte in 1847.

Dark Firefly

Pyropyga nigricans is a species of firefly in the family of beetles known as Lampyridae. It is found in Central America, North America and Central Europe.

Colorado Soldier Beetle

Chauliognathus basalis, the Colorado soldier beetle, is a species of soldier beetle in the family Cantharidae. It is found in North America.

Giant Water Scavenger Beetle

Hydrophilus triangularis, known generally as the giant black water beetle or giant water scavenger, is a species of water scavenger beetle in the family Hydrophilidae. It is the most common and widespread species of Hydrophilus in North America, being found across the contiguous United States, southern Canada, and Mexico.

Tomentose Burying Beetle

Gold-necked carrion beetle, or Tomentose burying beetle (Nicrophorus tomentosus), is a species of burying beetle that was described by Friedrich Weber in 1801. The beetle belongs to the Silphidae family which are carrion beetles. The beetles have sensitive antennae that contain olfactory organs. Thus, the beetle can locate dead animals (carcass), and then as the name ...more ↓

Rainbow Scarab

Phanaeus vindex, the rainbow scarab or rainbow scarab beetle is a North American dung beetle, with a range from the eastern US to the Rocky Mountains. The head is a metallic yellow color, and males have a black horn which curves backward toward the thorax. Both sexes have yellow antennae which can retract into a ball on the underside of the head. The thorax is a ...more ↓

Bumble Flower Beetle

Euphoria inda, the bumble flower beetle, is a species of scarab beetle in the family Scarabaeidae.

Ten-lined June Beetle

The ten-lined June beetle (Polyphylla decemlineata), also known as the watermelon beetle, is a scarab beetle, living in the western United States and Canada. The adults are attracted to light and feed on foliage. They can make a hissing sound when touched or otherwise disturbed, which can resemble the hissing of a bat. This sound is made by their wings pushing down, ...more ↓

brown scarab beetle

Phyllophaga lanceolata is a species of scarab beetle in the family Scarabaeidae. It is found in North America.

Tree Crickets

Tree crickets are insects of order Orthoptera. These crickets are in the subfamily Oecanthinae of the family Gryllidae.

Cave Crickets

The orthopteran family Rhaphidophoridae includes the cave weta, cave crickets, camelback crickets, camel crickets, spider crickets (sometimes shortened to "criders", or "sprickets") and sand treaders, of the suborder Ensifera; in some regions, such as Missouri and Virginia, these crickets are referred to as "cricket spiders." In ...more ↓

Orange-winged Grasshopper

Arphia conspersa, known generally as the speckle-winged rangeland grasshopper or speckled rangeland grasshopper, is a species of band-winged grasshopper in the family Acrididae. It is found in North America.

Green-striped Grasshopper

Chortophaga viridifasciata, the green-striped grasshopper, is a species of band-winged grasshopper in the family Acrididae. It is found in Central America and North America, ranging from British Columbia to the Gulf of Mexico (mostly east of the Rocky Mountains), south to Costa Rica.

Coral-winged Grasshopper

Pardalophora apiculata, known generally as the coral-winged grasshopper or coral-winged locust, is a species of band-winged grasshopper in the family Acrididae. It is found in North America.

Pard Grasshopper

Metator pardalinus, known generally as the blue-legged grasshopper or pard grasshopper, is a species of band-winged grasshopper in the family Acrididae. It is found in North America.

Carolina Grasshopper

Dissosteira carolina, the Carolina grasshopper, Carolina locust, black-winged grasshooper, road-duster or quaker, a large band winged species of grasshopper which ranges widely in North America inhabiting weedy grasslands.

Rainbow Grasshopper

Dactylotum bicolor, also known as the rainbow grasshopper, painted grasshopper, or the barber pole grasshopper, is a species of grasshopper in the family Acrididae. It is native to the United States, Canada and northern Mexico and exhibits aposematism (warning coloration). It was first described by the German entomologist Toussaint de Charpentier in ...more ↓

Two-striped Grasshopper

Melanoplus bivittatus (two-striped grasshopper) is a poikilothermic species of grasshopper belonging to the genus Melanoplus. It is commonly found in North America, with high quantities inhabiting Canadian prairies and farmland.

Plains Lubber Grasshopper

Brachystola magna, one of the grasshoppers known as plains lubber or western lubber, is a large grasshopper native to southern and central USA and Northern Mexico.

Big-eyed Toad Bug

Gelastocoris oculatus, the big-eyed toad bug, is a species of toad bug in the family Gelastocoridae. It is found in Central America and North America.

Jagged Ambush Bug

Phymata americana is a species of ambush bug in the family Reduviidae. It is found in Central America and North America.

Rhynocoris ventralis

Rhynocoris ventralis is a species of assassin bug in the family Reduviidae. It is found in North America.

Apiomerus spissipes

Apiomerus spissipes is a species of assassin bug in the family Reduviidae. It is found in Central America and North America.

Common Water Strider

Aquarius remigis, known as the common water strider, is a species of aquatic bug. It was formerly known as Gerris remigis, but the subgenus Aquarius was elevated to generic rank in 1990 on the basis of phylogenetic analysis. Aquarius remigis is found throughout North America, but is most prevalent in the mid-west of the United States.

Large Milkweed Bug

Oncopeltus fasciatus, known as the large milkweed bug, is a medium-sized hemipteran (true bug) of the family Lygaeidae. It is distributed throughout North America. It ranges from Central America through Mexico and the Caribbean to southern areas in Canada. Costa Rica represents this insects southern limit. It inhabits disturbed areas, roadsides and open pastures. Due to ...more ↓

Small Milkweed Bug

Lygaeus kalmii, known generally as the small milkweed bug or common milkweed bug, is a species of seed bug in the family Lygaeidae. It is found in Central America and North America.

Two-spotted Stink Bug

Perillus bioculatus, the two-spotted stink bug or double-eyed soldier bug, is a species of insect in the family Pentatomidae native to North America. Both the larval and adult stages are specialized predators of eggs and larvae of the Colorado potato beetle (Leptinotarsa decemlineata). However, the first instar larvae feed by sucking the juices out of potato ...more ↓

Red-shouldered Stink Bug

Thyanta custator, the red-shouldered stink bug, is a species of stink bug in the family Pentatomidae. It is found in North America.

Harlequin Bug

The harlequin cabbage bug (Murgantia histrionica), also known as calico bug, fire bug or harlequin bug, is a black stinkbug of the family Pentatomidae, brilliantly marked with red, orange and yellow markings. It is destructive to cabbage and related plants in tropical America as well as throughout most of North America, especially the warmer parts of the ...more ↓

Conchuela Bug

Chlorochroa ligata, the conchuela bug, is a species of stink bug in the family Pentatomidae. It is found in Central America and North America.

Say's Stink Bug

Chlorochroa sayi, or Say's stink bug, is a species of stink bug in the family Pentatomidae. It is found in North America.

Western Leaf-footed Bug

Leptoglossus clypealis, the western leaf-footed bug, is a species of leaf-footed bug in the family Coreidae. It is found in Central America and North America. In the 1980s, Hasan Bolkan discovered that the leaf-footed bug was a cause of lesions on commercially produced pistachio crops.

Western Conifer Seed Bug

The western conifer seed bug, Leptoglossus occidentalis, sometimes abbreviated as WCSB, is a species of true bug (Hemiptera) in the family Coreidae. It is native to North America west of the Rocky Mountains (California to British Columbia, east to Idaho and Nevada) but has in recent times expanded its range to eastern North America, and has become an invasive ...more ↓

Cactus coreid

Chelinidea vittiger, known generally as cactus coreid, is a species of leaf-footed bug in the family Coreidae. Other common names include the squash bug and cactus bug. It is found in Australia, Central America, and North America.

Eastern Boxelder Bug

The boxelder bug (Boisea trivittata) is a North American species of true bug. It is found primarily on boxelder trees, as well as maple and ash trees. The adults are about 12.5 millimetres (0.49 in) long with a dark brown or black colouration, relieved by red wing veins and markings on the abdomen; nymphs are bright red.

Eight-spotted Skimmer

The eight-spotted skimmer (Libellula forensis) is a dragonfly of the skimmer family.

Widow Skimmer

The Widow Skimmer (Libellula luctuosa) is one of the group of dragonflies known as king skimmers. The species can be found commonly across much of the United States (except in the higher Rocky Mountains areas) and in southern Ontario and Quebec. Adults have a steely blue body area but juveniles are yellow with brown stipes. Wings of both sexes are marked with prominent black ...more ↓

Twelve-spotted Skimmer

The Twelve-spotted Skimmer (Libellula pulchella) is a common North American skimmer dragonfly, found in southern Canada and in all 48 of the contiguous U.S. states.

Four-spotted Skimmer

The four-spotted chaser (Libellula quadrimaculata), known in North America as the four-spotted skimmer, is a dragonfly of the family Libellulidae found frequently throughout Europe, Asia, and North America.

Halloween Pennant

The Halloween pennant (Celithemis eponina) is a species of dragonfly in the family Libellulidae. It is native to eastern North America, including Ontario in Canada and the United States as far west as Colorado.

Variegated Meadowhawk

The Variegated Meadowhawk (Sympetrum corruptum) is a dragonfly of the family Libellulidae, native to North America.

Black Meadowhawk

The Black Darter or Black Meadowhawk (Sympetrum danae) is a dragonfly found in northern Europe, Asia, and North America. At about 30 mm (1.2 in) long, it is Britain's smallest resident dragonfly. It is a very active late summer insect typical of heathland and moorland bog pools.

Cherry-faced Meadowhawk

The Cherry-faced Meadowhawk (Sympetrum internum) is a dragonfly of the genus Sympetrum. It is found across northern and central United States and most of Canada, including southern portions of the Yukon and Northwest Territories. Its abdomen is brown, turning dark red at maturity in both sexes. The sides of the abdomen are marked with black triangles and the legs are ...more ↓

White-faced Meadowhawk

The White-faced Meadowhawk (Sympetrum obtrusum) is a dragonfly of the genus Sympetrum. It is found in the northern United States and southern Ontario. Adult males are identifiable by a distinctive pure white face and red bodies.

Western Meadowhawk

The Western Meadowhawk (Sympetrum occidentale) is a dragonfly of the family Libellulidae, native to western North America. In adult form, the Meadowhawk has a length of 1 1/4 to 1 5/8 inches (31 to 40 mm). The key distinguishing feature is a cloudy, orange-brown band that covers the inner half of each wing. The band may appear darker towards the outside. Males have a yellowish ...more ↓

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