Which cockroach is commonly found outdoors in warmer climates and referred to as a palmetto bug?

The American cockroach is commonly referred to as a palmetto bug, particularly in warmer climates where it is often found outdoors. This species thrives in humid environments, making it well-suited for outdoor habitats such as gardens and around palm trees, which aligns with its nickname. The American cockroach is one of the largest common cockroach species and is known for its reddish-brown color and distinct yellowish edges on its pronotum.

In contrast, the other cockroach species mentioned, such as the brown-banded cockroach, German cockroach, and Oriental cockroach, have different habitats and behaviors. The brown-banded and German cockroaches are typically more associated with indoor environments and human dwellings, while the Oriental cockroach prefers damp areas but is not commonly identified as a palmetto bug. Understanding these differences highlights why the American cockroach is specifically known as a palmetto bug in the context of outdoor cockroach populations.