Human-commensal
Guides
Araneus pegnia
Butterfly Orbweaver
Araneus pegnia is a small orb-weaving spider in the family Araneidae, commonly known as the Butterfly Orbweaver due to the distinctive butterfly-shaped pattern on its abdomen. It is among the smaller members of the genus Araneus, with mature females reaching only 3.5–8.2 mm and males 2.5–5 mm. The species has an unusually broad geographic range, extending from the northeastern United States through the southeastern states, west to Arizona and California, and south through Middle America to Ecuador. It is also found on Caribbean islands including Jamaica, the Bahamas, and Cuba.
Drosophila busckii
Busck's fruit fly
Drosophila busckii is a cosmopolitan fruit fly species that has evolved a unique ecological specialization among drosophilids: tolerance to and behavioral preference for dimethyldisulfide (DMDS), a neurotoxic sulfur volatile emitted by rotting vegetables and mushrooms. Native to North America, it has spread globally and is strongly associated with human environments as a commensal. The species uses DMDS as a key olfactory cue for locating food and oviposition sites, allowing it to exploit substrates toxic to competing drosophilid species. Its resistance mechanism likely involves insensitivity of the cytochrome c oxidase (COX) enzyme complex, the typical target of DMDS toxicity in other insects.
Gryllodes
decorated crickets, tropical house crickets
Gryllodes is a genus of crickets in the family Gryllidae, tribe Modicogryllini. The genus contains at least three described species, with Gryllodes sigillatus being the most widely known and economically significant. This species, commonly called the tropical house cricket or decorated cricket, has a cosmopolitan distribution associated with human habitation and is extensively cultured for pet food and human consumption. The genus is notable for its specialized mating behavior involving nuptial gifts.