A cockroach is an insect of the order Blattodea (or Blattaria). The American Cockroach (Periplaneta americana) is about 3 cm long. The German cockroach (Blattella germanica) is about 1.5 cm long. Tropical cockroaches are much bigger. When infesting buildings, cockroaches are considered pests. Cockroaches are often found around garbage and in the kitchen. Female cockroaches, or henroaches, are sometimes seen carrying egg cases on the end of their abdomen; the egg case of the German Cockroach holds about 30-40 long, thin eggs, packed like frankfurters in the case called an ootheca. The eggs hatch from the combined pressure of the hatchlings swallowing air and are initially bright white nymphs that continue inflating themselves with air and harden and darken within about 4 hours. Their transient white stage while hatching and later while molting has led to many individuals claiming to have seen albino cockroaches.














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A female German cockroach carries an egg capsule containing around 40 eggs. She drops the capsule prior to hatching. Development from eggs to adults takes 3-4 months. Cockroaches live up to a year. The female may produce up to 8 egg cases in lifetime. In other words, in favorable condition it can produce 300-400 offspring. The world's largest cockroach is the Australian giant burrowing cockroach, which can grow to 90 mm in length and weigh more than 30 grams. Comparable in size is the giant cockroach Blaberus giganteus, which grows to a similar length but is not as massive.

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