Category Archives: Bugs and beasties

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. 🙂

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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 that can be found in June in the Sierra de Grazalema.

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

Continue reading Hornets – The Gentle Giants of the Wasp World

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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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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