…ch to pupate. In so doing it may enter porches or cellars. The pupae are 10-12 mm long, grey-brown, almost oval, but they retain the long ‘tail’ and look somewhat like tiny grey mice. From the pupa emerges a hoverfly, but unlike those •already mentioned, this species is remarkably like a honey bee (see p. 31). Some hoverfly larvae can live in carrion and these have given rise to the very old story that bees can come forth from the rotting carcase…
Search Results for: Maggot - Blowfly larva
Fur beetle
…The larva of a fur beetle is unique in their appearance compared to other larvae. A typical larva is an elongated little creature that is white, yellowish, or beige. But a fur beetle larva has a brown color and is hairy. In the end, it has a hair-brush, which makes it easy to recognize, size wise they are up to 1 cm long. One can take the ordinary fur- or carpet beetle larvae as a brown carpet beetle larva, as they are related. The easiest way to…
Blowflies
Blowfly and pupa Latin: Calliphoridae Larva (maggot) from blowfly Long ago, before the months were named after Roman emperors, the month we now call July was called worm month in certain parts of northern Europe. The worms concerned were blowfly larvae or maggots and it reminds us of what a problem it must have been to keep meat fit for human consumption during the summer months. Eggs, flyblow from blowflies in fish The blowflies most commonly se…
Rat-tailed maggots
…. and Helophilus sp. Technically, Rat-tailed maggots are not a species. Rat-tail maggots are a term for larvae of hoverflies or drone flies. Hoverflies are also called Syrphidae, but overall, they are the two families Eristalis and Helophilus, when talking about rat-tail maggots. Rat-tail maggots, of course, got their name due to their appearance, which may resemble a rat tail. Rat-tail maggots may be disgusting animals, but they are as such not p…
Life cycle
…ve web and secured to a hair close to the skin. This egg hatches into a pre-larva which is similar to a fly larva with finely speckled skin and a few protuberances on the anterior end. The relevance of this stage is unknown, and the pre-larva does not leave the egg. Inside the pre-larva, a six-legged larva is developed. It is similar in appearance to adult fur mites. When hatching, the empty skin of the pre-larva is left inside the egg while the l…
Flour moth in the household
…simply digs deep into the stock of flour until it is fully grown. As a full-grown larva, it begins to pupate. The pupate period of the flour moth lasts 17-20 days, after which the adult flour moth immediately looks for a mate. Damage As mentioned, it is especially the larva that cause damage in stocks of flour and similar goods. The moth is of course also a problem, as it is the adult flour moth that lays the eggs in the flour. Flour moths can be…
Blowflies
…of blowflies normally live in the wild. Inside you can meet the heavy, blue-black blowfly, for example the species Calliphora erythrocephala and the slightly smaller, green-metallic shiny gold flies of the genus Lucilia. Blowflies lay their eggs, the so-called flyblow, in dead animals and other decaying organic materials (excrement, cheese, etc.). The eggs hatch less than a day after they are laid and the larvae bore their way directly into the fo…
Flour moth in the industry
…simply digs deep into the stock of flour until it is fully grown. As a full-grown larva, it begins to pupate. The puffing time of the flour moth lasts 17-20 days, after which the adult flour moth immediately looks for a mate. Damage It is especially the larva that damages stocks of flour and similar goods. The moth is of course also a problem, as it is the adult flour moth that lays the eggs in the flour. Flour can be difficult to control, as most…
Moths in textiles
…o eat as well as a steady temperature around 25 degrees. Both clothes moth larvae an fur moth larvae spin sticky threads, which protect the individual larva from drying out. This sticky web also helps to create a ‘tail’ of excrement, remnants of food and dirt. The larvae of the cloth moth move around whit this web is glued to the surface. The fur larva drags its web behind it in a tubular shape. Damage You know if you have moths in your textiles i…
Pale mottled willow
…it is a larva, it will be gray, brown, white and look like other butterfly larvae. Butterfly larvae have a main capsule, legs and what are called wart feet. Biology and behavior As mentioned, this larva is often found on or under different roofs, which gave it the name “roof worm”. It will typically be thatched roofs of straw. The reason why it is found here is that the “roof worm” lives on grass and hay and is therefore brought to the house with…
Trombiculosis
…. It has a diameter of 35-40 micrometers and the internal channel is only 5-10 micrometers wide. The larva feeds on lymphatic and dissolved tissue through the stylostome. At the same time, the stylostome functions as an anchor to harvest mite larvae. The identification is ensured by placing the mites found on a microscope slide with a drop of Hoyer’s Medium for further examination in microscopes of high magnification. The animals can be easily be…
Pigeon tick
…for the first 2 to 10 days of its life. When it has finished its meal, the larva hides in hiding in a crack or crack no more than a few meters from the nest, where it moves to change skin. The larva goes through several stages – where it alternately seeks out its meals on the pigeon and seeks shelter to change skin – until it is finally fully developed as either a sexually mature male or female. If the larva ends up as a male, it only has to worry…
Destructive flour beetle
…an be much larger than a fully grown beetle, in fact up to 10 mm long. The larva has a yellowish-brown color and can look like a very chubby worm to some people. The Destructive flour beetle is often mistaken with the mealworm beetle, as they roughly have the same appearance. The mealworm beetle is however larger than the Destructive flour beetle, so if it looks like a smaller version of a mealworm beetle, it is most likely a Destructive flour bee…
Mealworm Beetle
…lled the mealworm, is up to 30 mm long. It appears cubby compared to other larvae. It has a yellowish-brown color, almost a dark beige, and it has horizontal, dark strips down the body, which makes it resemble a worm. However, the surface of the mealworm is harder than that of a common earthworm, and it also has the glossy surface that its adult version has. Biology and behavior The mealworm beetle belongs to the family of shadow beetles (Tenebrio…
Australian spider beetle
…ir own whitish cocoon in which they pupate. The cocoon has an almost tissue-paper-like appearance, and the webs of the larva can be seen as thin threads and spun cocoons in the infested area. The development from larva to fully adult thief beetle lasts about 3 to 4 months if the larva has good conditions e.g., at room temperature. When the larvae are fully developed, they most often leave this safe area. This means that they sometimes have to clim…
Woodboring beetle
…r the Hadrobregmus pertinax. Its head is hidden under the neck shield. The larva is c-shaped and is white with yellow hairs. Biology and behavior To attract the females, the male makes a ticking sound, by banging his head against the woodwork. After mating, the female lays about 10 eggs, which are placed in cracks in the tree. The preferred cracks consist mainly of old fly holes or passages, where the newly hatched larvae will immediately drill in…
Bread beetle
…ld. The bread beetle larvae grow up to about 5 millimeters long. They are c-shaped, are white-yellow in color, and in addition are equipped with rather small legs. Biology and behavior The life cycle of an adult bread beetle is not exceptionally long and lasts only up to 2 months. During this time, a female bread beetle can lay about 100 eggs. It takes between 1 to 2 weeks before the small larvae hatch from the eggs. The newly hatched larvae are e…
Tanbark borer
…l development normally takes about 2 years. The adult larva pupates in an L-shaped passage of 2-3 centimeters, which it gnaws itself. Once the larva has gone through the process from larva to adult tanbark borer, it goes back through the pupae. It then gnaws its way through the bark of the tree, leaving an oval fly hole with smooth edges of about 4 × 6 millimeters. Damage The tanbark borer lays its eggs in deciduous trees. This means that it is ra…
Deathwatch beetle
…place the wood with treated wood, such as pressure-impregnated timber. However, it is also possible to treat the wood with a wood preservative that protects the wood from both insect and fungal attacks. In hard-to-reach areas, it can be an advantage to treat with an insect powder that is distributed on the areas where the beetle moves. It will kill the beetles before they have time to lay their eggs….
The hen flea
…larva has undergone its development, it spins a cocoon. In the cocoon, the larva undergoes its full transformation into a full-grown and sexually mature hen flea. A single bird’s nest can accommodate hundreds of cocoons with future generations of hen fleas. Under normal circumstances, the fleas break out of their cocoon in the month of April when the warmer temperatures occur. The appearance of hen fleas can also be stimulated by vibrations that o…
Dermestes lardarius
…e a consistent dark brown color on the body. However, the underside of the larvae is slightly lighter. The larvae are clearly articulated and have long bristles protruding from all its joints. The rear visible joint is equipped with two dark chitin hooks. The larva grows up to 13 mm long. Biology and behavior The Dermestes Lardarius belongs to a group of insects that specialize in cleaning up nature, feeding on the remains of animals and tissue. I…
Larder beetle larvae hairs.
…their tale end. The spines end in something that resembles a harpoon with 4-6 long barbs and along the shaft are 30-40 shell crests of barbs facing upwards. If larder beetle larvae feel threatened by other bugs, they turn the tail against the attacker and put up the spines. This usually results in some of them being ripped off. This troubles the attacker and can even lock the attacking animal’s limbs together so that it succumbs. Hair from larder…
Merchant grain beetle
…, as beetles typically do, six legs. As a larva, the merchant grain beetle larva has a yellowish-white color all over its body and a dark head. The larva becomes about 3 to 4 millimeters long. The merchant grain beetle is sometimes confused with the sawtoothed grain beetle, as the two species are closely related. However, there are easy ways to tell the difference between the two, for instance by keeping an eye on the behavior of the specific beet…
Brown dog tick
…lumps. After that, she has played her role and dies. From her eggs, small larvae hatch within 19 to 60 days. The larvae are small but active and look like confusingly small versions of the adult house tick. However, with the exception that the larvae have only six legs. The development from larva to adult male or female tick occurs through different stages. The newly hatched larva will first search for a host – preferably a dog. The larva selects…
House longhorn beetle
…lay several hundred eggs. The adult house longhorn beetle only lives for 10-15 days. After the larvae have hatched from the eggs, they gnaw into the tree through a small hole. Their journey goes towards the outermost layer, which is the most nutritious. The larvae eat the layer without at the same time gnawing through the surface of the wood. After this, the larvae gnaw further inwards, but no further than to the very core of the pine tree, which…
The harvest mite
…s that attack and suck out small insects and other mites. The harvest mite larva is a parasite of warm-blooded animals: rats, mice and birds. The larval stage cannot complete its development in humans, because we usually manage to scratch off the larva before it has time to eat. Larval bites are not felt. When bitten, a rash, Trombiculosis, occurs as the skin reacts to the mite saliva. The mites cannot be eradicated, but local nuisance can be part…
Wharf borer Beatle
…ake passages or tunnels, which is otherwise the custom for most of the tree-drilling larvae. Their development from larva to adult wharf borer beetle lasts between 1 to 3 years, depending on the conditions in the tree. Damage There is no doubt that wharf borer beetles can do great damage if they attack in the wrong places. It can for instance be an extremely difficult task if the beetles attack basements in houses located on framed wooden poles (p…
Tetropium luridum
…tunnels, which have a diameter of up to 1.5 cm, are full of wood dust. The larva first gnaws 2-4 cm directly into the tree and then turns and follows the grain of the wood, the tunnel having a total length of 4-6 cm. Pupa passages from black spruce beetle, Tetropium castaneum var. luridum When fully grown the larva makes a slightly enlarged chamber, which it closes behind it with coarse wood fibres, and then pupates. When the adult beetle emerges…
House longhorn
…ature and the nutritional content of the timber. The average length of the larval life is probably about 3-4 years, but it can be much longer. The larva feeds mainly on the sapwood and often gnaws outwards towards the surface until only a thin papery layer separates it from the outside world. The house longhorn’s fly hole can be recognized by its irregular shape When fully grown it pupates in a special pupal chamber which is sealed with coarse chi…
Violet tanbark beetle
…he development from larva to adult violet tanbark beetle takes in average 1-2 years. When the larva is fully developed, it will gnaw a 3-5 cm long passage into the wood, thereafter it will pupate in an enlarged den. It will close the den with rough wood dust. When fully developed, the violet tanbark beetle will emerge through the same hole as the larva entered and chew an oval exit hole of 6x4mm. You can encounter this species in June and August,…
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