The life of ... a cicada

Hi everyone,
We're back to talk about another animal.

Cicadas (Cicadoidea) are invertebrates and are 1.9cm to 5.7cm in size. There are 3 000 species that can be divided into annual cicadas and periodical cicadas. Annual cicadas can be seen annually and are found worldwide whereas periodical cicadas only leave the ground every decade or two and are only found in North America with hotspots in the eastern and central areas of the United States. Most annual cicadas have a lifespan of about two to five years and periodical cicadas can live up to the age of 17.

Female cicadas lay around 400 eggs split up over several places. They normally lay their eggs on twigs, branches or other vegetation. The eggs hatch after about six to ten weeks, now known as nymphs, and dig their way into the soil.

The nymphs feed on the liquids found in plant roots. They fully develop underground, before molting their shells and coming to the surface, now fully developed adults. They then mate and lay eggs. Periodical cicada adults die about four to six weeks after leaving the ground.

Periodical cicadas do emerge almost every single year though, because they are split into 15 staggered brood cycles, each one lasting about 13-17 years. A brood emerges once the ground temperature in the top 30cm of soil has reached 18 degrees Celsius, normally in late April and early May. Up to 1.5 million individuals are possible in one single acre. This may sound dangerous, however cicada clouds are not as destructive as locust clouds, because they drink tree sap rather than stripping vegetation. Although younger trees can suffer, the vast majority of mature trees recieve no permanent or serious damage from these plagues.

Cicada clouds are known to be very loud, reaching up to 100 decibels. Clicking and buzzing sounds are species specific and are used as alarm signals and mating calls.

Thank you for taking the time to read this. Happy Easter if you're celebrating it!

Your Green World Blog Team💚

Images:

This image, owned by lalo_pangue (on flickr.com) is licensed under CC BY-NC-SA 2.0.

This image, owned by Eric Parker (on flickr.com) is licensed under CC BY-NC 2.0.

Sources:

https://www.nationalgeographic.com/animals/invertebrates/facts/cicadas/

https://www.livescience.com/57814-cicada-facts.html

Comments

The life of ... a koala

Hello everyone, Today we're talking about koalas. Also known as koala bears, koalas are marsupials. So they're actually not bears. Koalas, phascolarctos cinereus , are tree dwelling and probably best known for spending most of the day sleeping. They live for up to 15 years in the wild although captive koalas generally live for longer. Koalas have a stout, gray body and a cream-coloured chest. They have a broad face, small yellow eyes and big fluffy ears. In adaptation to climbing, their feet are strong and clawed. Adult individuals in South Australia weigh 14kg and are 60-84cm big. Their Eastern cousins are considerably smaller. Koalas are found in Eastern and Southern Australia, where they live in eucalyptus trees. They feed on the leaves of these eucalyptus trees, eating up to 1.3kg a day. With a body weight of up to 14kg, this means they eat just under 10% of their body weight every single day. However, the le...

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...

Photo Essay || Iceland Series (part 1)

Hi Everyone! I recently went on a school trip to Iceland! It was such an incredible experience (and I'm going to sound cheesy now) but it was also incredible to do it with some of my closest friends! I saw so many incredible things and learnt so much, so I couldn't resist sharing a little Iceland mini series of posts, all about Iceland, both my experiences there and what I saw, but also the way it uses geothermal energy, and the animals, natural landforms and plants that are there. Today I'm sharing some photos of my trip. These are all photos I have taken, and are also the highlights so please bear that in mind as you browse these! I hope it is interesting and inspires you to book a trip to Iceland! The blue lagoon <33 landscapes.... Lost little farmhouses a...

18.10.20 Animal Of The Week: Sloth

Hello, Sorry this didn't come out on Sunday as planned but this week's animal of the week is the sloth because the twentieth of October is Sloth Day. Habitat The sloth resides in Central and South America. It lives in the rainforests there and occasionally drops into the water for a bathe as, believe it or not, they are actually excellent swimmers! Diet Sloths eat leaves, twigs and buds which they find in the rainforest. As they don't have incisors they smack their lips together to make leaves more digestible. Sloths can survive on relatively little food as it takes a while for them to digest it. Sleep and Speed When you think of a sloth, you probably think of this slow, sleepy creature. They actually sleep for about 15 hours a day! Sloths have an extremely low metabolic rate (what basic calories your body needs to survive), which means they move at a slow pace through the trees. On average, sloths travel 40 yards per day ...

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...

25.10.2020 Animal of the week: Snow leopard

Hello everyone, This week's post is about snow leopards. Snow leopards are incredible big cats that roam the mountain ranges of Asia. Snow leopards are very powerful and can climb up and down steep slopes easily, as well as jump up six times their body length. The snow leopard's tail provides balance, agility and warmth. The snow leopard is elusive and solitary and therefore very difficult to spot. They are very important though, because they are at the top of the food chain in this area. Habitat Snow leopards live in northern and central Asia's mountain ranges. These are some of the harshest conditions on earth. However, they white-grey coat with large black spots allows them to blend in with the rocky mountain terrain. They are found in twelve countries including China, Russia and Mongolia. Diet Snow leopards can kill prey up to three times their body weight. This is an incredible feat to pull off as they manage this on their ow...

16.08.2020 Animal of the week: Elephant

Hello. On the 12th of August it was International Elephant Day, so we decided that this week's post should be about elephants. Elephants are the largest living land mammals. There are three types of elephant; the African bush elephant; the African forest elephant and the Asian elephant. African elephants have larger ears, whereas Asian elephants have smaller ears. Elephants use their trunks to breath, bring food and drink to their mouths and to grasp objects. Elephants' legs are like pillars. They carry the Elephant's massive weight. African bush elephants weigh 6000kg, Asian elephants weigh 4000kg and African forest elephants weigh 2700kg. Basically, they are very heavy.Elephants eat grasses, small plants, bushes, fruit, twigs, tree bark, and roots. Elephants can live up to 70 years old in the wild. They communicate by sight, touch and smell. Sadly, these wonderful mammals are in danger. African elephants are listed as vulne...

Green Pets: how house plants can benefit your health🌱

Hi Everyone! Today I wanted to tell you about the benefits that house plants can have to your health. Enjoy :) 1. Reducing stress levels A study proved that having house plants makes you feel calmer and more natural, which in turn makes you feel less stressed and overwhelmed. I definitely agree that plants are very calming and I'm not surprised that it is scientifically proven! 2. Allergy relief Having house plants can reduce dust and mould, which could be amazing for people with those allergies. Obviously, you would want to avoid plants with a lot of pollen! 3. General Happiness Plants can boost your mental health and make you feel better about yourself. Employees who work in offices with plant life feel better about their jobs, feel less stressed and have less time off for health reasons. Some therapists even use plant therapy to help people with depression, anxiety and other mental health problems. 4. Boosting humidity If ...

Greta Thunberg's Speech at the UN Climate Action Summit 2019

Hi Everyone! I thought I would share the transcript of Greta Thunberg's inspiring speech from the UN Climate Action Summit. The phrase we remember is 'How dare you!'. But what did she really want us to take away from it? She wanted us to act, so watch the video using the link below and take action because the world isn't just going to heal itself. Greta Thunberg's speech at the UN Climate Action Summit video "My message is that we'll be watching you. This is all wrong. I shouldn't be up here. I should be back in school on the other side of the ocean. Yet you all come to us young people for hope. How dare you! You have stolen my dreams and my childhood with your empty words. And yet I'm one of the lucky ones. People are suffering. People are dying. Entire ecosystems are collapsing. We are in the beginning of a mass extinction, and all you can talk about is money and fairy tales of eternal economic g...

Green World

Search This Blog