{{Short description|Species of true bug}} {{Speciesbox | name = Common flowerbug | image = Anthocoris nemorum1.jpg | image_caption = Adult of ''Anthocoris nemorum'' | taxon = Anthocoris nemorum | authority = (Linnaeus, 1761) }}
The '''common flowerbug''' ('''''Anthocoris nemorum''''') is a common minute pirate or flower bug.<ref name="Fitter">{{cite book |author1=N Arlott |author2=R Fitter |author3=A Fitter |title=Collins Complete Guide to British Wildlife |publisher=Collins |year=1994 |isbn=0-00-219212-8 | page=224 }}</ref> ''A. nemorum'' was first described by Carl Linnaeus in 1761 in his Systema Naturae. ''A. nemorum'' is widely distributed across Europe and parts of Asia, extending into temperate regions of North America. Adults measure 3-4 mm and are recognized for their elongated bodies and reflective forewings. The species is valued in agriculture as a natural enemy of Aphid, Psyllid, Thrips, mites, and small caterpillars, making it an important component of Integrated pest management (IPM) programs. ''A. nemorum'' thrives in diverse habitats, including hedgerows, forests, orchards, and vegetable crops, and its ability to overwinter in bark and leaf litter ensures persistence across seasons. By reducing reliance on chemical pesticides, this generalist predator contributes to sustainable crop protection and ecological balance. It is considered beneficial in agriculture due to its role in controlling aphid populations<ref name=":0">'''Dixon, A. F. G., & Russell, R. J.''' (1972). Effectiveness of ''Anthocoris nemorum'' and ''A.'' ''confusus'' as predators of the sycamore aphid. ''Entomologia Experimentalis et Applicata'', 15(3), 297–302.<nowiki>https://doi.org/10.1111/j.1570-7458.1972.tb00259.x</nowiki></ref>. It has been used as a biological pest control since 1992, primarily to control ''Cacopsylla pyri''.<ref>{{cite web |author=EPPO / OEPP |author-link=European and Mediterranean Plant Protection Organization |year=2008 |title=Biocontrol agents: Hemiptera/Heteroptera |url=http://archives.eppo.org/EPPOStandards/biocontrol_web/heteroptera.htm |url-status=dead |archive-url=https://web.archive.org/web/20110928204800/http://archives.eppo.org/EPPOStandards/biocontrol_web/heteroptera.htm |archive-date=2011-09-28 |access-date=2011-07-03 |publisher=EPPO/OEPP}}</ref> Adults can be found all year.<ref>[https://www.inaturalist.org/taxa/359507-Anthocoris-nemorum iNaturalist] </ref> ''A. nemorum'' lays its eggs inside plant leaves<ref>{{Cite journal |last=Stenberg |first=Johan A. |last2=Lehrman |first2=Anna |last3=Björkman |first3=Christer |year=2011 |title=Host-plant genotype mediates supply and demand of animal food in an omnivorous insect |journal=Ecological Entomology |volume=36 |issue=4 |pages=442–449 |doi=10.1111/j.1365-2311.2011.01285.x}}</ref> often in groups of 2-8. Larvae hatch light reddish-brown and develop into adults over several weeks. Adults overwinter beneath bark or leaf litter, which allows populations to persist across seasons <ref name=":4">Sigsgaard''', L.''' (2010). Habitat and prey preferences of the two predatory bugs ''Anthocoris nemorum'' and ''A. nemoralis''. ''Biological Control'', 53(3), 344– 354. <nowiki>https://doi.org/10.1016/j.biocontrol.2009.11.005.x</nowiki> </ref>. It is capable of biting humans.<ref>{{cite book |author=DA Burns |url=http://media.wiley.com/assets/2103/68/9781405161695_chapter_38.pdf |title=Rook's Textbook of Dermatology, Volume 1, Eighth Edition |publisher=John Wiley and Sons |year=2010 |isbn=978-1405161695 |page=38.23}}</ref>
==Distribution== The common flowerbug is found across Europe and the Palearctic to China.<ref>[https://fauna-eu.org/cdm_dataportal/taxon/d0eeea36-9f6b-461b-a9a6-878c54611b97 Natura Europaea] </ref><ref> Bisby F.A., Roskov Y.R., Orrell T.M., Nicolson D., Paglinawan L.E., Bailly N., Kirk P.M., Bourgoin T., Baillargeon G., Ouvrard D. [http://www.catalogueoflife.org/annual-checklist/2011/details/species/id/6933769 Catalogue of Life] </ref> It is common in Great Britain and Ireland.<ref name="Fitter" /> In the Alps it is found to about 2000 meters above sea level.{{Citation needed|date=December 2025}}
==Habitat== It more commonly inhabits lower moist, shaded vegetation than trees,<ref name = brit>{{cite web |url=http://www.britishbugs.org.uk/heteroptera/Anthocoridae/Anthocoris_nemorum.html |title=(Cimicidae) Anthocoris nemorum |publisher=British Bugs |accessdate = 3 July 2011 |author=Joseph Botting}}</ref> and especially nettles in the later half of the growing season.<ref name=infl/> The species thrives in diverse habitats, ranging from hedgerows and deciduous forests to agricultural landscapes. In orchards, ''A. nemorum'' is frequently observed on apple and pear trees, where its ovipositor preferences align with high prey availability <ref name=":3">Sigsgaard, Lene (2004-05-28). "Oviposition preference of ''Anthocoris nemorum'' and ''A. nemoralis'' for apple and pear". ''Entomologia Experimentalis et Applicata''. '''111''' (3): 215–223. doi:10.1111/j.0013-8703.2004.00168.x. ISSN 0013-8703.</ref>. In cabbage fields, it contributes to pest suppression by preying on cabbage aphids and diamondback moth larvae, demonstrating its adaptability to vegetable crops <ref name=":1">Simonsen, M.‐L. R.; Enkegaard, A.; Bang, C. N.; Sigsgaard, L. (2009-03-02). "Temperature effect on the predation rate of ''Anthocoris nemorum'' (Het.: Anthocoridae) on cabbage aphids (Hom.: Aphididae)". ''Journal of Applied Entomology''. '''133'''(3): 198–200. doi:10.1111/j.1439-0418.2008.01327.x. ISSN 0931-2048.</ref>. The species has also been documented in strawberry crops, where generalist predators such as ''A. nemorum'' contribute to the control of Spider mite (''Tetranychus urticae'')<ref name=":2">Jacobsen, Stine Kramer; Sigsgaard, Lene; Hansen, Kristian; Harwood, James D.; Chapman, Eric G.; Hurtado, Mónica A.; Jensen, Annette B. (2019-02). "Generalist predator contributions to the control of Tetranychus urticae in strawberry crops documented by PCR-based gut content analysis". ''Experimental and Applied Acarology''. '''77''' (2): 133–143. doi:10.1007/s10493-019-00351-x. ISSN 0168-8162.</ref> . Prefers lower moist vegetation, especially nettles later in the growing season.{{Citation needed|date=December 2025}}
==Description== thumb|240px|left|thumbtime=1:13|Video clip of ''Anthocoris nemorum'' with prey thumb|240px|right|A nymph of ''Anthocoris nemorum'' ''A. nemorum'' is typically 3–4 mm in length. These bugs have soft elongated flat bodies, with reflective forewings and black pronotum. The legs are mostly orange-brown, with small dark patches close to the tips of the femora. The antennae are mainly orange, with dark tips. In particular, antennal segments I and IV are usually dark, while II and III are pale with dark apices. The front wing is shiny transparent with a distinctive black dot in the center. The membrane shows an hourglass-shaped characteristic black spot at the wing tip. Nymphs of ''A. nemorum'' are dark brown or reddish brown.<ref name=brit/><ref name =infl>[https://influentialpoints.com/biocontrol/Anthocoris_nemorum_common_flower_bug.htm Influential Points]</ref>
== Behaviour == Anthocoris nemorum is an efficient predator of small arthropods, particularly aphids and Thrips, which makes it an important contributor to pest suppression in agricultural systems . Laboratory and field studies have demonstrated that predation rates vary with temperature, with higher activity observed under warmer conditions<ref name=":1" />. This species also exhibits adaptive responses to pathogens. For example, individuals can detect and avoid surfaces contaminated with the entomopathogenic fungus Beauveria bassiana'','' thereby reducing mortality risk <ref name=":5">Meyling, Nicolai V.; Pell, Judith K. (2006). "Detection and avoidance of an entomopathogenic fungus by a generalist insect predator". ''Ecological Entomology''. '''31''' (2): 162–171. doi:10.1111/j.0307-6946.2006.00781.x. ISSN 1365-2311.</ref>. Although primarily beneficial, ''A. nemorum'' occasionally interacts with humans. Adults may bite when handled, producing a painful but harmless reaction.{{Citation needed|date=December 2025}}
Females have a specialized that allows eggs to be laid inside plant tissues which protect them from desiccation and predation. Oviposition behaviour is closely tied to host plants. Females show preferences for laying eggs on apple and pear trees, which aligns with their role in orchard pest management (Ovipositor) <ref name=":3" />. Habitat and prey preferences vary among related species, but ''A. nemorum'' is consistently associated with environments rich in aphid populations<ref name=":4" />. The species also exhibits behavioural physiology such as prey switching, which ensures feeding efficiency when preferred prey are scarce.{{Citation needed|date=December 2025}}
== Agricultural importance == ''A. nemorum is w''idely recognized as a beneficial predator in agricultural systems, where it contributes to the suppression of pest populations such as aphids, psyllid, thrips, mites, and small caterpillars. Its generalist feeding habits allow it to adapt to different prey depending on availability, making it a reliable component of Integrated pest management (IPM) programs <ref name=":0" />.
In an orchard systems, ''A. nemorum'' has been shown to reduce populations of pear psylla (''Cacopsylla pyri''), a major pest of pear trees, highlighting its role in fruit production<ref name=":3" />. In cabbage crops, it preys on cabbage aphids (''Brevicoryne brassicae'') and Diamondback moth larvae (''Plutella xylostella''), demonstrating its effectiveness in suppressing multiple pest species <ref name=":1" />
Environmental factors such as temperature strongly influence predation rates, with warmer conditions increasing feeding efficiency <ref name=":1" />. Additionally, ''A. nemorum'' can detect and avoid fungal pathogens such as ''Beauveria bassiana, which enhances its survival and long-term effectiveness as a biological control agent'' <ref name=":5" /> .
Habitat and prey preferences vary among ''Anthocoris'' species, but ''A. nemorum'' is consistently associated with environments rich in aphid populations, reinforcing its value in crop protection<ref name=":4" /> . By reducing reliance on chemical pesticides, the use of ''A. nemorum'' in IPM supports sustainable agriculture and minimizes environmental impact. Its ability to overwinter in bark and leaf litter ensures persistence across seasons, providing long-term pest control in managed ecosystems.{{Citation needed|date=December 2025}} ==References== {{Commons }} {{Reflist}}
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{{DEFAULTSORT:Common flowerbug}} Category:Anthocorini <!-- pending finer taxonomic category--> Category:Hemiptera of Europe Category:Insects described in 1761 Category:Articles containing video clips Category:Animal taxa named by Carl Linnaeus