Top 20 Most Common Insects in Morro Bay

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.

The lorquin's admiral has brown-black wings, each with a row of white spots across it. Its forewings have orange tips. The wingspan is 4.5 - 7 cm; females are generally larger than males. Larvae are usually yellow with a patch of white on the back.

Chlosyne gabbii has a wingspan of about 3.5 - 4.5 cm. The upperside of the wings is checkered with bright orange-brown and black, while the underside of hindwing shows pearly-white spots.

The gray bird grasshopper (Schistocerca nitens) is a gray or brown grasshopper with jagged edges on its back legs. It can fly long distances, but it flies in a clumsy pattern low to the ground. It's often found among a variety of trees and shrubbery, and it will often fly in large groups toward lights during nighttime.

Pagurus samuelis is a small hermit crab, at up to a total length of 40 mm (1.6 in) and a carapace width of up to 19 mm (0.75 in). The base colour of the exoskeleton is brown or green, but the antennae are red, and adults have bright blue bands near the tips of their legs. In smaller individuals, the bands may be white. The legs and carapace are covered in setae, and the rostrum at the front of the carapace is triangular.

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.

Their appearance is quite similar to that of the western tiger swallowtail, except they are a white-cream color or very pale yellow. Some pale swallowtails also have differing amounts of red-orange patches on the wings just above the tail. Tiger stripes and borders are thicker than those of western tiger swallowtails. The wingspan is typically 9 - 11 cm .Caterpillars are plump green with a single yellow band behind the thorax. They have two eye-shaped spots on the upper thorax, which may help frighten predators. Like most swallowtails, they have a red wishbone-shaped organ called the osmeterium, which pops out from behind the head and releases a foul odor to warn off predators. Caterpillars turn brown just before the fifth moult. The pupa is brown and looks like a piece of bark.

The western black widow (Latrodectus hesperus) is one of the few spider species that can harm humans. Pain from a bite can last up to twelve hours, but they do not bite unless provoked. The western black widow is also known for "sexual cannibalism." The female tend to eat the males after mating.

The upperside of the wings are white and marked with black and gray, more so on the female than on the male. The underside of the hindwings is marked with extensive yellow-brown veins. The wingspan is 3 - 4.5 cm . In its pre-adult form, the egg is orange, and mature larvae are black dotted and bluish green to gray with a yellow dorsal, lateral and sublateral stripe. The pupa overwinters, and varies in color from blue-gray to cream.