Oriental cockroaches and American cockroaches are both widely known as household pests around the world. They have a similar appearance at first glance, so if you have one of these creatures invading your home, then you might struggle to identify which species it is. However, when you look closer, there are actually a few identifying features. Let’s learn about these differences now!
Comparing an Oriental Cockroach and an American Cockroach
| Oriental Cockroach | American Cockroach | |
|---|---|---|
| Size | Length: 1 to 1.25 inches | Length: 1.1 to 2.1 inches |
| Appearance | Black or dark-brown color; males have wings almost reaching the abdomen; females only have pads in place of wings | Reddish-brown color with some yellow markings; long antennae, two sets of wings |
| Ability to Fly | No | Yes |
| Location and Habitat | Major presence in the United States, Europe, Israel, Australia, and South America Habitat: damp places around human houses, bushes, and underneath mulch | Major presence in North America, Spain, Portugal, and the Canary Islands Habitat: Anywhere humans live, from basements to kitchens to bathrooms to cabinets |
| Predators and Threats | Toads, frogs, lizards, geckos, iguanas, and humans. | Toads, fish, salamanders, lizards, geckos, mice, cats, etc. |
| Diet | Omnivores | Omnivores |
| Litter Size/Gestation Period | Litter size: 16 eggs Gestation period: 42-81 days | Litter size: 16 eggs Gestation period: 6-8 weeks |
| Lifecycle | 35-109 days | Typically around 700 days |
Key Differences Between Oriental Cockroach vs. American Cockroach
The primary differences between the American cockroach and the oriental cockroach are their size and appearance. For a start, American cockroaches are larger than oriental cockroaches. They also have a different appearance, with the oriental cockroach being darker than the American cockroach. Let’s take a closer look at these differences below.
Oriental Cockroach vs. American Cockroach: Size
Oriental cockroaches often max out at 1.25 inches.
©Yuliia Hurzhos/Shutterstock.com
The main difference between the American cockroach and the oriental cockroach is their size. American cockroaches are larger than oriental cockroaches, reaching 1.1 to 2.1 inches. In fact, American cockroaches are generally regarded as being one of the largest species of cockroaches to invade homes. In comparison, the oriental cockroach has an average length of 1.25 inches. Female oriental cockroaches are also slightly wider than their male counterparts.
Oriental Cockroach vs. American Cockroach: Appearance
American cockroaches and oriental cockroaches also differ in terms of appearance. Oriental cockroaches typically have a dark brown or glossy black color. The males have wings extending almost all the way down their abdomen, while females have pads in place of wings.
American cockroaches, on the other hand, have a reddish-brown color with some yellow spots behind their heads. They also have long antennae and two sets of wings, with the fore wings being the stronger ones.
Oriental Cockroach vs. American Cockroach: Flying Ability
The American cockroach can fly.
©iStock.com/ViniSouza128
Another significant difference between the oriental and American cockroaches is their ability to fly. As we’ve just mentioned, male oriental cockroaches have wings, whereas the females do not. However, just possessing wings doesn’t mean that they can fly, meaning that the males are also flightless. On the other hand, American cockroaches do have the ability to fly, although it is limited. Instead, they can fly short distances, usually when they are threatened or when they are looking for food.
Oriental Cockroach vs. American Cockroach: Location and Habitat
American cockroaches and oriental cockroaches typically share similar habitats, and both have a cosmopolitan distribution.
Oriental cockroaches are mostly found in the United States, Europe, Israel, South America, and Australia. However, due to global commerce and international trade, they now have a cosmopolitan distribution and can be found all over the world. Their habitats include moist places around the house, like damp basements, leaky drains, pipes, and other such areas. They are also found outdoors during warm weather in areas like sewers, trash cans, and under mulch.
American cockroaches are more commonly found in North America, Spain, Portugal, and the Canary Islands. American cockroaches are now found worldwide due to global trade, with significant populations in North America and many other temperate and tropical regions. They often live in houses, especially in kitchens, bathrooms, cabinets, and basements. They can also be found outdoors in crawl spaces, lawns, sidewalks, and porches, to mention a few.
Oriental Cockroach vs. American Cockroach: Lifecycle
The oriental cockroach and the American cockroach also have different life cycles. The American cockroach’s lifecycle averages 700 days, making it one of the longest cockroach lifecycles in the world. The stages from egg to adult can take around 600 days, and the adult stage can last from 100 days to one year. In comparison, the oriental cockroach’s lifecycle is much shorter, spanning only 35 to 190 days.
