Category Archives: Bugs and beasties

Hornets – The Gentle Giants of the Wasp World


English: Hornet
Scientific: Vespa crabro
Spanish: Avispón / Avispa Europea
Catalan: Vespa xana
Portuguese: Vespa grande

Description
Hornets (Vespa crabro) Avispón
Hornets (Vespa crabro) Avispón

This article, Hornets – The Gentle Giants of the Wasp World, is about the native hornet to Spain Vespa crabra.

Read about the invasive species of hornets in Spain over at Wildside Holidays: https://wildsideholidays.co.uk/hornets-in-spain/

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Butterflies on the wing in June in the Sierra de Grazalema

These delicate insects can be seen in a multitude of colours, patterns and sizes, ranging from 3 to 10 cm and from plain white to jazzy orange mosaics. There are 80+ species of butterflies on the wing in June in the Sierra de Grazalema. Some are rare and localised, others are common throughout Europe.

Read more about butterflies in Spain over at Wildside Holidays: https://wildsideholidays.co.uk/butterflies-found-in-andalusia/

A hot sunny day in June, proved to be a good time to see a variety of butterflies whilst walking on the Sierra de Endrinal footpath above the village of Grazalema. Some species were numerous, others in singles and not all of them posed to be photographed, but this will give you an idea of what butterflies you might be able to see in Grazalema. Heres the list of the butterflies seen on the day and a gallery of images of some of them. 🙂

Continue reading Butterflies on the wing in June in the Sierra de Grazalema

Carpenter Bees (Xylocopa violacea) Abeja azul de la madera

Carpenter Bees (Xylocopa violacea) Abeja azul de la madera are large, virtually all black bees which visit flowering plants and shrubs throughout the spring and summer, their scientific name is Xylocopa violacea. The later part of this name derives from the beautiful purple / blue sheen seen on the wings as they catch the sunlight. These black bees are common in central and southern Europe.

Carpenter Bees (Xylocopa violacea) Abeja azul de la madera
Carpenter Bees (Xylocopa violacea) Abeja azul de la madera in the Sierra de Grazalema

Do not be alarmed by their size of up to 23mm, they are not aggressive and will simply go about their business of collecting nectar from flowers, chooseing to fly away from people. The male does not have the ability to sting. The males will chase other males in competition as well as females that they wish to mate. At this time they can be noisy, crashing into walls, windows etc. If caught and handled the female may sting as a means of self defence.

Carpenter Bees (Xylocopa violacea) Abeja azul de la madera
Male Carpenter bee (note orange tips on antenna) Carpenter Bees

The name carpenter bee is due to their using dead wood to breed in. The female uses her mandibles to chew into the wood, creating tunnels into which she will lay up to 15 eggs. The small bits of wood that break away, will either be discarded or used to separate the egg cells. They are just as content to place their eggs in an existing tunnel such as a bamboo tube. Each egg will be provided with pollen on which to eat when it hatches.

These bees are very efficient pollinators of open flowers but can also use their size and weight to break into long tubular flowers from above and steal the nectar without collecting and distributing any pollen.


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Everything you need to know before you visit Ronda “The city of dreams” in Andalucia. https://www.rondatoday.com/


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Thread-waisted Wasp (Sceliphron spirifex)

Sporting the colours yellow and black of a normal wasp, the Thread-waisted Wasp (Sceliphron spirifex) looks strangely disconnected in flight. The overall length is from 19 to 25mm with part of that made up of a yellow “thread” or pedicel. The body is mainly black with yellow bands on the long legs which hang down in flight. They can be found in Southern Europe and Africa.

Sceliphron spirifex are solitary wasps and are not aggressive, they do not sting unless mishandled. The sexes look very similar with the female being larger and with a visible sting.

Collecting mud for the nest - Thread-waisted Wasp (Sceliphron spirifex)
Collecting mud for the nest – Thread-waisted Wasp (Sceliphron spirifex)

The female searches out an ideal shelter to create a mud daub nest, by flying repeatedly around an area and finally walking around to be thoroughly sure in her choice.

Shade from the sun and shelter from the rain are priority. Fine particles of mud are then collected, balled up and flown back to the chosen site. They will search out a damp patch from an irrigation system, pond or puddle, returning frequently during the day to collect more.

Mud nest of Thread-waisted Wasp (Sceliphron spirifex)
Mud nest of Thread-waisted Wasp
Mud nest of Thread-waisted Wasp (Sceliphron spirifex)
Mud nest of Thread-waisted Wasp (Sceliphron spirifex)

Several cells are connected along side each other, sharing the mud walls, but they are individual, sealed tube. Each cell will contain one egg and be provided with food for the larvae when it hatches.

The food is in the form of small spiders with between 6 and 14 per cell. These are mostly small crab or jumping spiders that the wasp hunts and brings alive but paralised to the mud cell.

Thread-waisted Wasp (Sceliphron spirifex)
Thread-waisted Wasp (Sceliphron spirifex)

Similar species

There are quite a few thread wasted or potter wasps in Spain. The Great Potter Wasp is quite beautiful but has a gruesome lifecycle similar to the thread wasted wasp detailed above.


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Insects in June in the Sierra de Grazalema

Summer time is when many insects reach the adult phase of their life. They may have spent months, even years as a larva, drab in colour and unable to move far, possibly living underwater or underground. Now, in this last stage of their lifecycle, they might be brightly coloured, able to fly or to emit sounds and so they become more obvious to us. Insects are a very important part of the food chain on which we depend. We also rely heavily on insects for their ability to pollinate much of our food crops, and so they deserve at least a moment of our time. Here is a tiny selection of Insects in June in the Sierra de Grazalema

Insects in June in the Sierra de Grazalema
Southern Swallotail (Iphiclides feisthamelii).
Insects in June in the Sierra de Grazalema

Of the many butterflies on the wing during June, the Swallowtail will catch your attention due to its large size. Their main colour is a pale creamy-yellow with striking black stripes. If you can get close to one when it is stationary, then look for the red and blue scales on the hind wing, near its long ”tails”. These bright “eyespots” attract the attention of a hungry bird, if the bird successfully grabs the false eyes, then the butterfly will lose a piece of its wing but perhaps get away with its life.

See more information about butterflies in Spain over at Wildside Holidays: https://wildsideholidays.co.uk/butterflies-found-in-andalusia/

According to biologists, it is a species in its own right rather than a subspecies of the Scarce Swallotail (Iphiclides podalirius)
The larvae, caterpillars, feed on wild or domestic fruiting trees such as Blackthorn (Prunus spinosa), Cherry (Prunus cerasus) and Apricot (Prunus armeniaca) and so are often associated with gardens and orchards.

Orange-winged Dropwing (Trithemis kirbyi).
Insects in June in the Sierra de Grazalema

A brightly coloured dragonfly which has only recently made its home in Spain. This species is expanding its territory northwards from North Africa into southern Europe. The eyes, body and legs of the male are bright red with large patches of amber at the base of all four wings. Although fast flying when hunting or patrolling, they will often rest on a rock, a stick, or open ground beside a body of water. Their favourite areas include swimming pools, rivers with rocky bases and small irrigation ponds.

Read more about dragonflies in Spain here: https://wildsideholidays.co.uk/dragonflies-and-damselflies-in-spain/

At rest they may lower their wings which give rise to the common name of “dropwing”. Dragonflies hunt small flying insects and will often dash out from their perch, catch something and return to their resting spot to eat it.

Cicada (Cicada orni).
Insects in June in the Sierra de Grazalema

These are well camouflaged insects and you will only notice their presence by the powerful call emitted by the males to attract the females, a sound which accompanies long hot summer days. If you are inquisitive enough to search for them, you will notice that they often go quiet as you approach. Their overall length is approximately 2.5cm, they have bulbous eyes which are set wide apart and their transparent wings are decorated with black veins and several spots.

The adults feed on tree sap which is why they usually rest on tree trunks. They have a long proboscis which is tucked underneath the body and is not easily seen. The females lay their eggs in the late summer or autumn. As an adult they live for 1 or 2 months, whereas the larvae will live underground for several years, feeding on moisture from plant roots. This species is common in southern and central Europe

Egyptian Grasshopper (Anacridium aegyptium).
Insects in June in the Sierra de Grazalema

This is the largest grasshopper we have in this area and to see it fly is impressive. Size alone of the fully grown adults is enough to recognise them, you can also identify them by the vertical dark stripes in their eyes and they usually have a pale orange line along the pronotum; a shield like cover behind the head. The size of the adult can vary from 30 to 70 cm, with the males being smaller than the females.

The nymphs are similar in appearance to the adults, although their abdomen is more visible as the wings develop only a small amount with each moult that they undergo. The colour of the youngsters is varied and can be sandy, green or ochre.

Andalusian Bushcricket (Steropleurus andalusius).
Insects in June in the Sierra de Grazalema

Although this is a sizeable bush-cricket (20 to 35 mm) which often sits up in branches of shrubs, unless you are scanning the plants it may go unnoticed. They vary from straw coloured to brown or green, each with yellow along the sides. On this species the head is bulbous, the antennae emerge from close below the eyes and they have vestigial wing buds (the yellow area just behind the pronotum). Found in dry, scrub areas of Andalucía, they are omnivorous; eating such things as leaves, eggs and caterpillars.

Bush-crickets: have very long, fine antennae. The long, sabre-like appendage is not used in defence, this is only seen on the females and is called an ovipositor; used to place the eggs into soil or plant material – depending on the species.

Red-striped Oil Beetle (Berberomeloe majalis).
Insects in June in the Sierra de Grazalema

This is an unmistakeable beetle due to its distinctive size, shape and colour. The body is up to 6cm in length, black and ringed by red (or orange) stripes, hence the common name. These are warning colours, and this species is also known as a type of blister beetle; as a defensive mechanism it can excrete oil along its body that will blister skin on contact. These heavy bodied beetles are unable to fly and will drag their abdomen along.

These beetles have recently (2021) been reclassified into seperate species. Find out more here: https://wildsideholidays.co.uk/red-striped-oil-beetle-berberomeloe-majalis-aceitera/

As adults they eat plants and can climb surprisingly well. They live in sandy habitats where the female can dig a hole to lay hundreds of eggs in the soil. Once the tiny larvae hatch, they emerge from the soil and climb onto a flower. Here it will wait for a solitary species of bee; if lucky it will latch onto one and be carried back to where she lays her egg. The young beetle devours the egg and pollen food store, giving it the energy it needs to then develop into an adult beetle itself.

I hope you enjoyed Insects in June in the Sierra de Grazalema. Please feel free to leave a comment!


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