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The German cockroach (Blattella germanica), colloquially known as the croton bug, is a species of small cockroach, typically about 1.1 to 1.6 cm (0.43 to 0.63 in) [1] [2] long. In color it varies from tan to almost black, and it has two dark, roughly parallel, streaks on the pronotum running anteroposteriorly from behind the head to the base of ...
Female cockroaches are sometimes seen carrying egg cases on the end of their abdomens; the German cockroach holds about 30 to 40 long, thin eggs in a case called an ootheca. She drops the capsule prior to hatching, though live births do occur in rare instances.
Oothecae are made up of structural proteins and tanning agents that cause the protein to harden around the eggs, providing protection and stability. [1] The production of ootheca convergently evolved across numerous insect species due to a selection for protection from parasites and other forms of predation, as the complex structure of the shell casing provides an evolutionary reproductive ...
Egg cases are about 0.9 cm (0.35 in) long, brown, and purse-shaped. Immature cockroaches emerge from egg cases in 6–8 weeks and require 6–12 months to mature. After hatching, the nymphs feed and undergo a series of 13 moultings (or ecdysis). Adult cockroaches can live up to an additional year, during which females produce an average of 150 ...
The oriental cockroach (Blatta orientalis), also known as the waterbug (as they live in damp areas) or black cockroach (as their bodies are mostly dark), [1] is a large species of cockroach, adult males being 18–29 mm (23 ⁄ 32 – 1 + 5 ⁄ 32 in) and adult females being 20–27 mm (25 ⁄ 32 – 1 + 1 ⁄ 16 in). [2]
Blattella asahinai, the Asian cockroach, is a species of cockroach that was first described in 1981 from insects collected on Okinawa Island, Japan. [1] It is a small species of cockroach, typically 1.3 to 1.6 centimetres (1 ⁄ 2 to 5 ⁄ 8 in) long and tan to dark brown in colour with dark parallel stripes on the back of their heads. [2]
A live German cockroach nymph was on a cardboard box at a beverage preparation area, the report said, and a dying nymph was on the floor next to the kitchen cooler.
German cockroach. The species can be easily distinguished by the dark longitudinal stripes that only occur in the German cockroach. In size, shape, and color, the amber wood cockroach is very similar to the german cockroach (Blattella germanica), which is regarded as a hygiene pest. The most noticeable difference is the uniformly brown pronotum ...
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