The life of ... an alcon blue butterfly

Hi everyone,

Today we are going to be looking into the life of an alcon blue butterfly (Phengaris alcon).

After mating, the females lay their eggs on marsh gentian, a blue-coloured wildflower. The eggs can only be laid on these flowers, as this is what the newly hatched caterpillars will eat. Although in some alp regions, they can also be found on willow gentians, a close relative of the marsh gentian. Once the caterpillars have hatched from the eggs, their main predator and danger are the ants that swarm below. But high on their plant homes, the caterpillars are safe.

However, this isn't where the alcon blue caterpillars are going to stay forever. Eventually, they drop down to the ground using silk strings. With no protection, they are soon dragged off by the ants. The most amazing part is, the alcon blue caterpillars give off the same scent and chemicals as the ant larvae. So the ants take the caterpillars back to their brood chamber, where the caterpillars are quickly fed just like the ant larvae. The caterpillars will even make similar sounds to that of the queen ant, to receive even more attention. Due to the immense amount of food, the caterpillars become massive and well-developed.

The caterpillars will stay in the ants' nest for almost two years. Then they pupate. Fast forward a few weeks, and an adult alcon blue butterfly emerges. They now must quickly leave the ants' nest and climb up a nearby grass stem to unfold their wings before flying away to find a mate.

This life cycle saves the blue alcon butterfly from a lot of work and ensures that no caterpillars die from starvation. However, if either the ants or the marsh gentian were to go extinct, so would the alcon blues. In other words, they aren't adaptive and in a fast-changing world, this might be their downfall.

Some ant colonies change the scent their larvae give off to stop the blue alcon's from getting in. This has sometimes been called an 'arms race' between the butterflies and the ants. Depending on location, the butterflies will use different ant species as hosts, all from the genus 'Myrmica'.

An interesting phenomenon is when the ''Ichneumon eumerus'' wasp tracks down the blue alcon caterpillars that are staying in the ants' nests. Once the wasps have found the blue alcons, they spray the nearby ants with a chemical that makes them attack each other. In all the confusion, the wasp injects the caterpillars with its eggs. When the caterpillar pupates, the wasp larvae feed on the chrysalis from the inside.

Despite all of this, blue alcon butterflies are classified as Least Concern and have habitats dotted around Europe and northern Asia.

Your Green World Blog Team💚

Sources:

https://en.wikipedia.org/wiki/Phengaris_alcon

https://www.wildlifetrusts.org/wildlife-explorer/wildflowers/marsh-gentian

https://www.jungledragon.com/specie/1297/alcon_blue.html

Documentary: Our Planet (2019) voiced by David Attenborough E5 From Deserts to Grasslands 32:00 (Available on Netflix and Youtube)

Images:

1st image: This image is owned by Erik Karits on pexels.com.

2nd image: This image is owned by Erik Karits on pexels.com.

Comments

Photo Essay | dolphin spotting boat ride

Hi Everyone! Quite a while ago now, me and my family went on a dolphin spotting boat ride, and I've been meaning to share some photos for ages now! We saw so many dolphins very close up and we managed to get some good shots, although it can never be as magical as in person! All photos in this post were taken by me or my family. They were so close to the boat! This photo is stunning! It's under the water! Again - under the water! It was so hard to capture them jumping! This was the boat.... ...

29.11.2020 Animal Of The Week: Jaguar

Hello, Today (29th November) is world Jaguar day so this week our animal is the Jaguar. The Jaguar is an animal I know pretty much nothing about so I am going to learn a lot too! Jaguars (panthera onca) live for 12 - 15 years. Their heads and bodies are 150-180cm long and their tails are 70-90cm long! They weigh 45 - 110 kg. Habitat Jaguars live primarily in the Amazon Basin, though they can be found in smaller numbers in Central America. They once lived everywhere from central Argentina up to the southwestern United States but since the 1880s they have lost over half of their territory. They are mainly found in tropical rainforests but can live in savannas and grasslands. Diet They eat fish and turtles as they are actually quite competent swimmers as well as deer, iguanas, birds and monkeys; they will eat almost anything! Are they endangered? Jaguars are classed as near endangered and face several threats. South and Central Americ...

Animals 21-25 in our '50 incredible animals' series

Hi Everyone! Here are the next five animals in our current series! We hope you learn something from this. 21. Stick insect Stick insects are masters of disguise. They look like twigs or leaves. This strange appearance makes them hard to spot when stationary. Stick insects are herbivores, feeding on leaves, and can live for up to three years. Their habitat includes most tropical and subtropical regions, but there are a few species that live in temperate areas as well. There are roughly 3 000 different stick insect species! Not much more is known about them, because they are difficult to find. The two main threats to their populations are the pet trade and people killing them so as to frame their carcasses, like butterflies. Their conservation status ranges from critically endangered to least concern - so basically every category that is on the list! 22. Glass frog The glass frog is, well, see through. You can literally ...

Deforestation and why it’s a problem

Hi everyone, Welcome back to another post. Today we’ll be talking about deforestation and its impacts on our earth. Deforestation, the widespread clearance of natural forests, has been happening for thousands of years. One example is Western Europe, where, two millennia ago, 80% of the land was cloaked in dense forest cover. However, over time, a significant portion of this green expanse was sacrificed to create room for crops, livestock grazing, and as a source of fuel and building materials. Presently, a mere 34% of Western Europe retains its woodland. Today, the tropics deal with the brunt of deforestation. Activities such as mining, agriculture, road construction, and the establishment of vast cattle ranches drive the mass clearance of tropical rainforests. This results in the release of huge amounts of carbon dioxide into the atmosphere, exacerbating the global climate crisis. The consequences come in two waves: first, the reduced number of...

Ecotourism: what it is, the advantages and the disadvantages

Hi Everyone! Today we wanted to talk about the idea of ecotourism, including the advantages and disadvantages of this concept. If you are looking to reduce your environmental and social impact when travelling, then this is the post for you! Ecotourism is a form of tourism which limits the damage to the environment and local community. It can involve helping in community projects such as planting trees, as well as taking part in local customs and festivals. It helps to keep the local culture alive, while preserving the natural environment. The advantages are abundant. By helping in a project conserving the environment, tourists gain a new understanding and appreciation for the natural world and may be inspired to make changes in their "real" life to live more sustainably. It provides a valuable insight to a country and community, perhaps also inspiring more respect for different people and the lives they lead. The projects also provide sustainable income sources for locals, h...

Our 50th post! - and animals 1-5 in the '50 incredible animals' series

Hello Everyone, Today is a special post - to celebrate our 50th post we are starting a new series. This series is about 50 incredible animals. We can't promise that you haven't heard of any of them, but we have tried our best to find some of the most rare and in some cases bizarre animals possible. We can't fit 50 animals into one post so we have split them out over 10 posts. We'll try and publish at least one post every one or two weeks, but you know that we're not very good at keeping to the schedule! So the first five animals that you will (hopefully) find incredible: 1. Dumbo octopus They are the deepest living of all octopus species and are able to pounce on their prey and eat it whole. Their diet includes snails and other creatures they 'hoover up from the ocean floor'. They are called Dumbo elephants as a nod to Disney's elephant because they have fins that resemble the elephants infamous big ears! The...

Animals 31-35 in our '50 incredible animals' series

Hi Everyone! Welcome back to our blog, today we are sharing another 5 incredible animals. This is part of a series to celebrate our 50th blog post, all about unusual animals! Enjoy! 31. Pangolins These creatures are often mistaken for reptiles but they are in fact mammals. They are covered in scales and use them to defend themselves because similar to a hedgehog, they curl up into a ball. They eat ants, termites and larvae. They eat using their tongue, which is very long- sometimes even longer than their body! Sadly, Pangolins are in high demand as their meat is considered a delicacy their scales are used in traditional folk remedies, which means that there is an illegal trade. Luckily, there have been many initiatives put in place to help these animals by WWF and similar organisations. 32. Macropinna Microstoma This is a species of fish that live at about 600m below sea level. They hang nearly motionless in the water and have a very unusual...

Animals 11-15 in our '50 incredible animals' series

Hello, We have another five amazing animals for you today. Enjoy! 11. Dhole This is a dog species which looks rather like a red fox . They are difficult to put into any of the dog subfamilies. They aren't foxes, nor wolves, nor domestic dogs. Dholes are fast runners and live in packs of 5-12 individuals. Although sometimes, different packs will join forces to become a pack of 30 or more individuals! However, these super packs are broken up after a successful hunt. The different packs rarely attack each other as neighbouring packs are often closely related. Dhole packs live in burrows with multiple entrances. They can be found in eastern and southern Asia. They eat wild berries, insects and lizards and as a pack hunt deer, rodents and other wild mammals. Interestingly, unlike other dogs, they rarely kill by biting at the throat. They are also good swimmers! 12. Irrawaddy dolphin The Irrawaddy dolphin can be found in coastal areas of south a...

06.09.2020 Animal Of the Week: Seven-spotted Ladybird

Hello Everyone, Welcome to this week's animal of the week post. This time about the ladybird, and personally I can't wait to find out more about these creatures. Enjoy! Which ladybird we are investigating today? Today, I am telling you about the seven-spotted ladybird (Coccinella septempunctata), which is the most common ladybird in Europe. Other species include the Two Spot Ladybird and other uncommon ladybirds such as the 16 Spot and other peculiar types. Habitat The seven-spotted ladybird lives in a variety of habitats such as meadows, gardens and hedgerows. They can also be found on farmland, especially with crops such as alfalfa, clover and wheat and corn before it grows too tall. Diet The seven-spotted ladybird feeds on a range of aphid species. This is why they are often referred to as a gardener's best friend as they eat these creatures who can damage plants. They can also eat white flies and anything else that is soft-bo...

Coral reefs

Hello! We would love to introduce you to the topic of coral reefs and especially coral reef bleaching, as it is a greatly ignored but certainly significant topic. Have fun! 5 coral reef facts 1. The Great Barrier Reef is the largest living structure on the planet and is 2300 km long! 2. Less than 0.1% of the world's ocean surface is covered in coral reefs. 3. At least 25% of all marine animals live there. 4. Coral reefs are often known as the rainforests of the ocean. 5. In 1 square kilometre of coral reef, up to 35 tons of fish can be 'produced'. The 5 biggest coral reefs in the world 1. Great Barrier Reef (near Australia) 2. Red Sea Coral Reef (near Egypt, Israel and Djibouti) 3. New Caledonia Reef (Pacific Ocean near New Caledonia) 4. The Mesoamerican Barrier Reef (near Mexico, Belize, Guatemala and Honduras) 5. Florida Reef (Atlantic Ocean/Gulf of Mexico near Florida) What is coral? Coral is actually made up of small anim...

Green World

Search This Blog