Top 20 Most Common Insects in Colorado

The bold jumping spider (Phidippus audax) earned that name from its ability to be sneaky and jump on their prey. Their incredible eyesight allows them to spot prey from greater distances than other spiders. Another possible way it could have earned its name is due to its mating habits. If the female approaches too quickly the male can jump away.

The variegated fritillary (Euptoieta claudia) earns its name from the greek work Eutptoietos, which means "easily scared." This is because they are incredibly difficult to approach, darting away if anyone comes close. They are identified with a checkered orange and black on its wings. The variegated fritillary is unique among butterflies for its ability to have two or three broods per year, resulting in many potential children.

Sympetrum semicinctum can reach a length of 2.5 - 3.5 cm, with a wingspan of 4.5 - 6 cm. The male has a bright red abdomen with black markings on the lower sides and on the top of the segments 8 and 9, creating a U like pattern. The thorax is brownish red and the sides show three irregular black stripes. Face and eyes are dark red. The legs are black. The hind wings have a rusty patch at the base, covering one-third of the wings, while the front wings are almost completely transparent. Pterostigma is blackish red. The female is mainly greenish-yellowish or orange, with red over green on eyes and extended blackish markings on the abdomen. Mature females sometimes turn red like males, while immature males are yellow like females and slowly reach their red coloration.

The widow skimmer (Libellula luctuosa) is a large insect that grows to be incredibly large with a bulbous head and body. As they age, they are known to grow whitish, much like our grandparents' hair. They live in the water until their final molt, where they reveal their wings, it is at this point it reveals why it has part of a group called the king skimmers.

The two-tailed swallowtail (Papilio multicaudata) is easily identified with its yellow body and tiger-like stripes. It also has two tails, or spikes, coming off the back of its wings. Also, females are commonly larger and more brightly colored than males. They also have eyespots near the rear of their wings, which fool predators and give them a chance to escape.

The common Pill-Bug is a nocturnal woodlouse species that's fairly popular among hobbyists and sometimes kept as a pet. When disturbed, this small bug rolls into a ball, resembling a pill or armadillo, hence both its Latin and common English names. Compared to other Armadillidium species, this one is able to withstand drought more than any other.

Melanoplus bivittatus, the 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.

The variegated meadowhawk is a small to medium-sized dragonfly with a slender abdomen, often reaching a length of 4.5 - 23 cm. The male is commonly dark brownish black with an abdomen of bright red, pink, and golden brown. The thorax may be marked with a pair of yellow dots on each side. The leading edges of the wings are marked with pinkish. The females are similar in color but not as brightly colored, with gray and yellow replacing the red of the male. Young variegated meadowhawks are much paler and mottled with pale green, pale yellow, golden brown, and orange.

The convergent lady beetle (Hippodamia convergens) is one of the most common lady beetles in North America, which is a great thing given that it is a common biological control agent of aphids. They lay a good chunk of eggs over a couple of months. If you have ever seen a small, black alligator-like insect, you may have seen one of its larva.

The brown-belted bumble bee (Bombus griseocollis) can be distinguished from other bumble bees because of the brown belt on its abdomen. It's often found in urban landscapes, near sunflowers, thistles, and milkweed. The males often fly very high in search of females, and they've even been spotted at the top of the Empire State Building.