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

Ecosia

We all need to do something to save our planet: it is no use just leaving it to Greta Thunberg! She is very inspirational, yes, but she can only do so much. She isn't superhuman! The climate crisis is up to us; up to you. We all have to get stuck in. Research, learn, discover and most importantly: never give up! The world's animals need us. The world's trees need us and a simple way to do this is to switch to Ecosia. Ecosia is a search engine but it plants trees while you search the web. Okay, it doesn't have as many websites as google so you may want to have google as a backup but it plants trees: this is your opportunity to make a simple change. Just google Ecosia and search to plant trees. Make a difference. Image: This image is owned by Binyamin Mellish on pexels.com .

Overfishing- An Introduction

When writing the article on the Yangtze Finless Porpoise, I briefly touched on the topic of overfishing. Many of you have probably heard about it, and know it is a massive problem threatening our seas and their inhabitants. Overfishing is so destructive, it can kill all life in the ocean, and many of you might be part of it every day. So I read through many articles from international organisations, and they all say pretty much the same things. It's a highly complex topic, with so many things to say and do, so this is just an introduction to the broadest points. It's very interesting (and sad) but when you look into it further you realize there is actually a lot you can do! This is very important, especially for ocean lovers and seafood people. What is overfishing? By definition, overfishing is so intense fishing, people catch fish quicker than the stocks can reproduce. Leading to a massive decrease in stocks that can peak in the extinction of a s...

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...

Pollination

Hello everyone, Today we're talking about pollination and its importance in the world's ecosystems. First a bit of basic plant biology. To reproduce most plants do have a differentiation into male and female, but not in the same way that we see in mammals. Both male and female reproductive organs can be found on the same plant, although not in the same place. Male gametes are produced in the stamens and are then found in pollen. On the other hand, female reproductive organs are called pistils and egg cells are found in the ovule (normally in the flower heads). Pollination describes the process of transporting the pollen to the egg cells, making it an essential part of the reproduction of plants. Nearly all seed plants worldwide require pollination to reproduce. Cone bearing trees also need pollination. Pollination is almost always assisted by other organisms such as insects, birds and mammals to transport the pollen. In some species wind ...

October Top tips | homemade presents

Hi everyone, So today we're going to talk about sustainable homemade presents. If you start now, then some of these would make amazing Christmas presents. 1. Knitting, crochet, embroidery & more yarn items You can make some incredible presents by knitting or crocheting with wool or thick yarn. All you need are needles and wool/yarn. Wool can be expensive if you want good quality so check out this post about making your own yarn out a t-shirt! With thinner yarn you could make some amazing thing through embroidery. Here are some project ideas: Scarfs Socks Blankets Jumpers Pouch Dishcloths Table mat Headband Fingerless gloves Keychains Friendship bracelets Wall decorations Handles for hot pots and pans Figurines Bag designs 2. Origami Origami is an amazing way to show someone that you put time into what you made. You can use paper of any size, colour or pattern. Here are some ideas: Swans ...

September Top Tips | recycling

Hi everyone, Today we are going to be talking about recycling. Recycling is quite big thing in the media, with some critics saying that it doesn't help. But I would say that even though it isn't going to save the world, it will make a small difference and probably save you some money! So here are some recycling ideas (although depending on your personal situation it might be up cycling or down cycling): An old t-shirt turned into an apron An old t-shirt turned into a cushion Tin cans turned into plant pots Tin cans turned into pencil holders Plastic bottles or clear plastic tubes turned into bird feeders An old handbag turned into a picnic basket Lotion, shampoo and conditions bottles turned into storage A shoebox turned into a make up organiser Old t-shirts turned into a baby blanket Plastic spoons turned into mirror decorations Bike parts into a lamp shade An old piano turned ...

Green Pets || easy house plants to get you started // best house plants for beginners

Hi Everyone! Today I wanted to talk to you about some easy house plants you could look after to get you started on your green pets journey. These are plants that are easy to look after and that I recommend for an introduction into caring for house plants. If you are a beginner or want to look after some plants, then this is the post for you! 1. Cacti - moon cactus I don't actually have a cactus, but they are the obvious place to start. They need little water and thrive in warm conditions; they are described as "low maintenance". I have done some research and it looks like the moon cactus (Gymnocalycium mihanovichii) is the best one in terms of not being too fussy with needing minimal water and tolerates lower light levels. I would like a cactus at some point, but if you are just starting out wanting to care for some house plants, then this is the one to start with! 2. Aloe Vera One of my first house plants, this is one that is rela...

Private jets - are they really as bad as people say?

Hello everyone, On social media, they will be an uproar every few months because some celebrity used a private jet to get somewhere. Today, I'll be talking about whether these flights really are as bad as they seem or whether social media is just making a big deal out of nothing. Emissions: private jets vs public flights Private jets are 5 to 15 times worse than commercial flights per passenger. Also, private flights are normally not 4 hours long, some of them are only 20 to 30 minutes! These flights are worse because taking off and landing emit more greenhouse gases . With a flight that's only 20 or so minutes, you've only got 10 minutes at the most where you're actually flying 'normally'. So when it comes to emissions, private jets are very bad for the environment. Morals You can't talk about private jets without talking about the morals involved. The first moral problem with private jets is the people who use them....

10 Animals on the Edge of Extinction No. 10- The Javan Rhino

The Javan rhino is listed as the 1st animal on WWF’s list of the 10 world’s most endangered animals, and I for my part, had never heard of it! If you hadn’t either, we’re changing that now. A bit about the rhino’s lifestyle The Javan rhinos are now exclusively found on the island of Java in Indonesia, but were once found in vast regions of northeast india and Southeast Asia. They have a dark grey colour which looks almost black when wet, and their (often pink) skin folds look a bit like plated armor. Both males and females have lower incisors which resemble tusks that they use to fight. Males have one relatively short horn of about 25 cm (10 inches). Javan Rhinos live in tropical forests, marshy areas and in the thick bush. They are mainly browsers and eat over 100 plants species they find in the forest, weigh between 900 and 2300 kg (1984-5071 pounds) and are between 3 and 3.2 meters (10- 10.5 feet) long. How endangered are we talking? Javan rhinos are the most ...

10 animals on the edge of extinction you didn't know about no.4 - Sumatran elephant

Hello everyone, This is the 4th post in our '10 animals on the edge of extinction you didn't know about'. Today we are going to be talking about Sumatran elephants. You've probably all heard about Sumatran tigers, which are also on the edge of extinction, but Sumatran elephants are much less well-known. Characteristics Sumatran elephants live for around 70 years and grow 2 - 3.2m tall. They weigh 2 000 to 4 000 kg and are the smallest subspecies of Asian Elephant. The males have tusks, however, these don't grow as long as their African counterparts. The females also have tusks but these are normally so small, that they are hidden under the upper lip. Sumatran elephants are herbivores, eating bark, bananas, young fresh leaves and occasionally various wild herbs. Social lives Elephants are very social and live in herds of 20 - 35 individuals. These herds are led by a dominant female. Males leave when reach adolescence, either willi...

Green World

Search This Blog