In general, most oothecae are very small, between 0.07 and 0.19 inches in length. … Many species of cockroaches produce dark brown to reddish-brown oothecae. Some of these egg casings have ridges, such as those produced by the brown-banded and German cockroaches

Can you see roach eggs?

The reason that you don’t know what cockroach eggs look like is that chances are you will never see them. Instead, what you will see is a brown, capsule-shaped, enclosed egg case that holds many cockroach eggs or developing nymphs.

What color is cockroach eggs?

The American cockroach’s ootheca is dark brown in color and averages 8 mm in length. One female may create six to 90 oothecae in her lifetime. The female American cockroach carries the ootheca for a few hours to a few days, at which point she deposits the egg case in a safe, hidden location.