Melanie Gutteridge

Large Rove Beetle - Jötunuxi - Ránbjöllur - Skordýr -

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• published: 21 Oct 2016
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Devil's coach horse beetle - Ocypus olens - Cocktail beetle - Rove beetles - Staphylinidae - I found this big beetle nearly drowned in my pond - saved her on dry land. Jötunuxi - Ránbjöllur - Ég vissi ekki fyrst hvaða skordýr þetta var en fannst ólíklegt það lifði í vatni og tók það upp úr vatninu. Datt fyrst í hug þetta væri risastór Jötunuxi. Fann svo að þetta er Devil's coach horse beetle sem ég veit ekki hvað kallast á Íslensku. Þessi bjalla er mjög gagnsöm í garðinum og étur alskonar skordýr og snigla, lirfur og maðka. A large rove beetle with extended exposed abdomen covered by hardened plates and composed of 8 segments. Uniformly black body covered in fine, black hairs. See more: http://www.naturespot.org.uk/species/devils-coach-horse Jötunuxi - Creophilus maxillosus. Jötunuxar eru með litla skjaldvængi sem hylja aðeins fremsta hluta afturbols. Jötunuxar eru rándýr eða nærast á sveppgróum. Um 60 tegundir jötunuxa eru á Íslandi. Stærstur er jötunuxi (Creophilus maxillosus), sem er um 2 cm á lengd, svartur með grátt þverbelti yfir skjaldvængina. Lesa meira: https://is.wikipedia.org/wiki/J%C3%B6tunuxar Jötunuxi var algengur í kringum útihús í sveitum hér áður fyrr. Með breyttum búskaparháttum hafa taðhaugar við gripahús horfið og búsmali stendur nú yfirleitt á grindum og er hugsanlegt að með því hafi þrengt talsvert um kjöraðstæður stórra jötunuxa. Sumir segja reyndar að maður hætti að sjá þegar maður hækkar úr grasi og það á sjálfsagt ekki síst við um pöddur. Eflaust verður maður meira var við þær á barnsaldri. En af þessum litlu jötunuxum er mikill fjöldi og þeir eru mjög gagnlegir. Þeir éta til dæmis mikið af eggjum annarra skordýra. Lesa meira: http://www.mbl.is/greinasafn/grein/545229/ The rove beetles are a family (Staphylinidae) of beetles, primarily distinguished by their short elytra (wing covers) that typically leave more than half of their abdomens exposed. See more: https://en.wikipedia.org/wiki/Rove_beetle Ýmsir eru smeykir við jötunuxa sem er þó alveg óþarfi því þeir eru alveg hættulausir. Kannski er ástæðan sú að sumir þeirra fljúga og stór jötunuxi á flugi virkar ógnvekjandi. Lesa meira: http://www1.nams.is/smadyr/landid/dyr.php?val=22&id;=28 This black beetle usually shelters during the day under stones, logs, or leaf litter. It is most often seen in forests, parks, and gardens between April and October. It is a predator, hunting mainly by night, feeding on invertebrates including worms and woodlice, as well as carrion. The prey is caught in the mandibles which are also used to cut and together with the front legs to manipulate the food into a bolus. The bolus is repeatedly chewed and swallowed, emerging covered with a brown secretion from the foregut, until it is reduced to a liquid which is digested. Skin (in the case of earthworms) and hard materials (from arthropods) are left. The larvae are also carnivorous with similar eating habits. This beetle has been associated with the Devil since the Middle Ages. Hence its common name, which has been used at least since 1840. Other names include Devil's footman, Devil's coachman, and Devil's steed. One dictionary proposed the name developed in parallelism with ladybird and its Norse cognates. In Irish, the beetle is called dearga-daol or darbh-daol. British folklore has it that a beetle has eaten the core of Eve's apple, and that a person who crushes such beetle is forgiven seven sins. See more: https://en.wikipedia.org/wiki/Devil%27s_coach_horse_beetle The Devil’s Coach Horse is the largest of the rove beetles and can reach a length of around 28mm. Typical to this family, the Devil’s Coach Horse is a long-bodied, uniformly black beetle with an extended exposed powerful abdomen with shortened wing cases (elytra). Although able to fly its wings are rarely used. See more: https://www.buglife.org.uk/bugs-and-habitats/devils-coach-horse Both predators and prey are important in any ecosystem. The Devil’s Coach Horse eats other invertebrates, some of which may be garden pests. In doing this, it helps to reduce pest populations, recycle nutrients and maintain a healthy ecosystem. See more: https://www.opalexplorenature.org/devilscoachhorse Samkvæmt gamalli trú mátti hafa af jötunuxa gagn. Reynt var að halda börnum frá varasömum vatnsbökkum með þeirri sögu að brunnklukkur gætu flogið upp úr vatninu, upp í munn og áfram niður í „maga“ þar sem þær myndu éta lifrina. Það eitt var þá til ráðs að gleypa jötunuxa sem myndi drepa brunnklukkuna. Ekki verður lagt mat á ágæti þeirrar ráðleggingar hér. Lesa meira: http://www.visindavefur.is/svar.php?id=15258