Published: Stag beetle, (family Lucanidae), also called pinching bug, any of some 900 species of beetles (insect order Coleoptera) in which the mandibles (jaws) are greatly developed in the male and resemble the antlers of a stag.In many species the elaborately branched and toothed mandibles may be as long as the beetle itself. Some species grow to 8 centimetres (3¼ inches), but most are about 5 centimetres (2 inches). Male rainbow stag beetles generally have long, curved mandibles, although the smaller males can have short mandibles. Stag Beetles, Family Lucanidae. Elsewhere in Britain they are extremely rare or even extinct.Female stag beetles prefer light soils which are easier to dig down into and lay their eggs. Stag beetle, (family Lucanidae), also called pinching bug, any of some 900 species of beetles (insect order Coleoptera) in which the mandibles (jaws) are greatly developed in the male and resemble the antlers of a stag.In many species the elaborately branched and toothed mandibles may be as long as the beetle itself. They only live for a few weeks after they have turned into an adult. How long will the footprints on the moon last? Larvae After the third instar stage, the pupal stage lasts about 32 days, where it will transition into an adult. Stag Beetles have a long life cycle, lasting up to seven years from egg to adult. john_sunseri Answer has 7 votes Currently Best Answer. 5. It is endangered and is the UK's biggest terrestrial beetle. Merchant Grain beetles can be found all over the world and can live in cooler climates. Currently voted the best answer. Some species grow to over 12 centimetres, but most to about 5 cm. Did You Know? Here’s a brief rundown on where you’ll find beetles, both indoors and outdoors. Frequently asked questions I’ve found an adult stag beetle – what do I do now? These beetles tend to be very small in size, usually growing to be less than an inch (2.5 centimeters) long. Quiz. Stag Beetles have a long life cycle, lasting up to seven years from egg to adult. Adult beetles can live for three to six months … Larvae What do stag beetles look like? Rearing trial in a terrarium in a well ventilated garage; eggs laid in July-August 2009, teneral imagos in September 2011 (unpublished). 2. Why? Stag beetles are often very spectacular insects with huge mandibles, or "pincers," which give the insect its common name -- the mandibles on some look like the horns of a stag deer. Wiki User Answered .   Fremlin, M. (2010)  Observation of a female stag beetle on a freshly cut stump. Stag beetles can be found in Southern and central Europe. john_sunseri 11 year member 53 replies Answer has 7 votes. Because most of their life cycle is being a larva. (Some female beetles keep their eggs inside of them and give birth to live larvae). However, in the Continent, the minimum life cycle duration is 4 years, this probably because the beetles are bigger than the ones in the UK, thus take longer to develop, and/or other climatic factors. Stump cut in 2009, two male stag beetles emerged in 21 and 23 May 2012. Below is a diagram attempting to illustrate a minimum life cycle duration of 3 years * compressed in a circle, starting at the … Stag beetles belong to the family Lucanidae. The picture below shows how I keep some of my beetles … Where do they live? Answer. Asked by serpa. Last updated Feb 16 2017. They are a group of about 1,200 species. Males can reach a size of 68 mm in the wild. After several molts, they eventually reach adult size and form. It begins with the female beetle laying hundreds of tiny, oval white or yellow eggs, usually on a leaf or in rotten wood. 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