This article is written in American English, which has its own spelling conventions (center, color, defense, realize, traveled) and some terms that are used in it may be different or absent from other varieties of English. According to the relevant style guide, this should not be changed without broad consensus.
The text of the entry was: Did you know ... that a few cockroach species (example pictured) are kept as pets, and several species are raised as food for insectivorous pets?
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I haven't read it yet, but the one thing I noticed was that the In research section was just one sentence, so consider expanding that (if you can); expand in areas such as: why do people research on cockroaches opposed to other insects, and what discoveries have been made (that benefit humans)
There is a mish-mash of American and British English; I'm seeing "generalised", "generalized" (in the same paragraph), "realised", "colors", "recognize", "characterised", "specialisation", and "behavior"
In the Description section, change :They have relatively small heads and broad, flattened bodies, and..." to "They have a relatively small head and a broad, flattened body, and..."
In the Description section, change "The tegmina or first pair of wings are tough and protective..." to "The tegmina, or first pair of wings, are tough and protective..."
In the Social behavior section, put the last paragraph, second seconds, in quotes using template {{pull quote|1=insert quote and source}}, and also state who said it
I have stated "Lihoreau and his fellow researchers stated:", and if they didn't say it, then I don't know who did. I haven't got access to the research study. Cwmhiraeth (talk) 18:04, 7 December 2015 (UTC)[reply]
In the Sounds section, change "...in the presence of a potential mate some..." to "...in the presence of a potential mate, some..."
In the Digestive track section, change "...the wood-eating cockroach Panesthia cribrata is able..." to "...the wood-eating cockroach, Panesthia cribrata, is able..."