Top 20 Most Common Insects in San Marcos

In general, the butterfly has a wingspan of 2.5 - 3.5 cm, with males being slightly smaller than females. Females are further differentiated from males by their number of functional legs; females possess three pairs, while males do not utilize their shortened forelegs and thus only have two. The Canadian populations have been described as having white checked dark brown wings, a gray body, green eyes, and black and white banded antennae. There is a reddish tint towards the base of the forewings, and the ventral side of the wings are gray.

The fiery skipper (Hylephila phyleus) is a butterfly of the family Hesperiidae and is approximately 1 inch (2.5 cm) long. The males are orange or yellow with black spots while the females are dark brown with orange or yellow spots. The caterpillars are greenish pink with a black head. The caterpillars are often considered pests and can feed on Bermudagrass, creeping bentgrass, and St. Augustine grass. Fiery skippers, along with all other species of skippers and skipperlings, can hold their wings in a "triangle" shape. The forewings are held upright, and the hindwings are folded flat. This position is thought to better absorb the sun's rays. The fiery skipper lives in North and South America, from Canada to Argentina. It is a migratory species.

California spiny lobster (Panulirus interruptus) is a crustacean - a lobster, native to Baja California's coasts. It has no claws, only two large antennae. These lobsters are nocturnal and hide during the day with only their antennae protruding from their shelters, where they often aggregate in groups. This is a highly popular fishery species for both commercial and recreational fishing.

The wingspan is 2 - 3 cm.

M. pergandei has a head of equal length and width, with very large mandibles. It has short white or yellow hair and a large thorax. Males typically measure about 8.5 mm (0.33 in) and females about 10 mm (0.39 in). However, individual size can vary based on factors such as availability of food and interspecific competition. The species is named after American myrmecologist Theodore Pergande.

The green fig beetle (Cotinis mutabilis) is a pest because it devours fruits like apricots, figs, peaches, and plums. However, the larvae don't harm fruit because they burrow underground and feast on compost instead. The adults are a metallic green color, and they can fly for long distances in search of fresh fruit.

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.

Cabbage white (Pieris rapae) derives its common name from its habits as a caterpillar, which is a ferocious pest for cabbage, kale and broccoli farmers. In North America, it is one of the first butterflies to emerge in spring, heralding the beginning of the season.

Seven-spotted ladybug (Coccinella septempunctata), known in North America as the "seven-spotted ladybug," is the most common species of ladybird in Europe and the official state insect of five U.S. states. While not native to North America, it has established itself there after being introduced to control aphid populations. Its bright coloring deters predators, and it may also play dead or secrete foul-smelling liquids to discourage consumption.

The harlequin Bug (Murgantia histrionica) is a pitch-black bug that is marked with yellow, red, or orange markings. Despite its pretty appearance, don't let it fool you. It is considered a major pest of cabbage crops. The "stink" part of its name comes from the defensive chemical it produces. To us and other predators, this ability is signaled by its brilliant appearance.