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Of all common cockroach species, the American cockroach has the largest body size; molts 6–14 times (mostly 13 times) before metamorphosis; and has the longest life cycle, up to about 700 days. [6] It has an average length around 4 cm (1.6 in) and is about 7 mm (0.28 in) tall. [7]
At the other end of the size scale, Attaphila cockroaches that live with leaf-cutter ants include some of the world's smallest species, growing to about 3.5 mm in length. [25] Head of Periplaneta americana. Cockroaches are generalized insects with few special adaptations, and may be among the most primitive living Neopteran insects. They have a ...
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 ...
The Florida woods cockroach (Eurycotis floridana) is a large cockroach species which typically grows to a length of 30–40 mm (1.2–1.6 in). [2] When alarmed, adults can eject an extremely foul-smelling directional spray up to one metre (3.3 ft), [3] which inspired several of its other common names: Florida skunk roach, Florida stinkroach, skunk cockroach, skunk roach, stinking cockroach ...
Cockroaches are hemimetabolous; there is no pupal stage and the nymphs resemble the adults apart from their size and the absence of wings. [21] Female cockroaches produce an egg sac known as an ootheca and can hold anywhere from 12-25 eggs depending upon the species. [23]
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]
This cockroach is similar in appearance to the American cockroach (P. americana), but darker in color and with thicker, wider, triangular cerci. It is a reddish-brown color and has fully developed wings. [2] It reaches up to 4 centimeters in length. [1] It produces an ootheca about 1.2 to 1.6 centimeters long containing about 24 eggs on average ...
The eggs are laid in leaf litter. [9] Up to 13 oothecae are produced by a female over 3 to 40 days [5] (blocking the ocelli of the females has been found to inhibit the laying of eggs [5]). The oothecae are produced as in other cockroaches by the secretions from the asymmetrical colleterial glands of the females. [10]