page_title: Coreus marginatus
section_title: Life cycle
hierarchical_section_title: Coreus marginatus / Life cycle
caption_attribution_description: English: Dock bug. Dorsal and ventral view of adult and early instar. Locality: Fronton, Midi-Pyrénées, France Size&#160;: (antennae and legs off)&#160;: Adult 14 mm.- Juvenile 6.9mm Français&#160;: Corée marginée. Face dorsale et ventrale d’un individu adulte et d’une forme juvénile Localité&#160;: Fronton, Midi-Pyrénées, France. Taille (hors antennes et pattes)&#160;: Adulte 14 mm.- Juvénile 6.9mm
context_page_description: Coreus marginatus is a herbivorous species of true bug in the family Coreidae. It is commonly known as the dock bug as it feeds on the leaves and seeds of docks and sorrels. It is a medium-sized speckled brown insect, between 13 and 15 mm long as an adult, with a broad abdomen. It occurs throughout Europe, Asia and northern Africa. It is often found in dense vegetation, such as hedgerows and wasteland.
context_section_description: Like other Coreidae the dock bug has an annual life cycle consisting of an egg followed by five successive nymphal instars before becoming an adult. It overwinters as an adult and copulates in the typical heteropteran back-to-back position, laying large brown eggs between late May and early July. The eggs take around 3 to 4 weeks to hatch. The young nymphs will feed on leaves and stems while the older nymphs, like the adults, feed on seeds. The nymphs mature to adults from August onwards.
caption: Adult male and nymph shown from dorsal and ventral views
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