By Judy Molland
From those small cabbage whites to the largest swallowtails, there are thousands of unique and beloved butterfly species on the planet. Many of us see them outside every day in the spring and summer, but how much do you know about these colorful insects?
Here are 10 fascinating facts to consider next time you cross a butterfly's path:
1. There are more than 17,500 recorded butterfly species around the world, 750 of which can be found in the U.S.
2. Butterflies and moths are part of the class of insects in the order Lepidoptera. Butterflies are flying insects with large scaly wings. Like all insects, they have six jointed legs and three body parts: the head, the thorax and the abdomen. The wings are attached to the thorax and they also have a pair of antennae, compound eyes and an exoskeleton.
3. The Cabbage White, seen above, is the most common butterfly in the U.S. Although it appears mostly white with black markings on the top of its wings, underneath those wings are yellowish-green. These butterflies have a wing spread of just about two inches. Males have only one spot on each wing, while females have two. As you probably know, you can find Cabbage Whites in most open spaces, including gardens, roadsides, parks and cities.
4. Monarch butterflies migrate to get away from the cold. However, they are the only insect that migrates an average of 2,500 miles to find a warmer climate. The iconic North American Monarch has been greatly affected by extreme weather events, going through drastic dips and spikes in numbers over the past several decades. The overall pattern continues to point downward, with a 95 percent population decline over the last 20 years, but conservation efforts are helping: There were more monarch butterflies migrating in 2015 than there were in 2014.
5. Monarchs are not the only butterfly that migrate. The Painted Lady, American Lady, Red Admiral, Cloudless Sulphur, Skipper, Sachem, Question Mark, Clouded Skipper, Fiery Skipper and Mourning Cloak are among the other butterflies that also migrate, but not as far as the Monarchs.
6. The Common Buckeye Butterfly is one of the most striking butterflies, with its bold multicolored eyespots and thick upper-wing bars, all designed to frighten away any birds that might be tempted to chomp on them. If you look under its wings, you'll find a more abstract profusion of brown, orange and beige. These insects are pretty common all over North and Central America, although you won't find them in the Pacific Northwest or in the far north of Canada.
7. The Orange Barred Sulphur Butterfly is one that you can find all over the Americas and the Caribbean. It's very distinctive, being bright yellow with patches of orange marking both forewings and hindwings. Females tend to be bigger and darker than their male counterparts and unusually, just like the adult butterflies, the caterpillars also have bright yellow bodies segmented by dark stripes.
8. Speaking of caterpillars, how much do you know about the life cycle of a butterfly? The butterfly starts its life as an egg, laid on a leaf. The caterpillar (larva) hatches from the egg and eats leaves or flowers. It loses its skin many times as it grows, increasing greatly in size. Eventually it turns into a pupa, or chrysalis and finally a beautiful adult butterfly emerges and the cycle continues.
9. An adult butterfly has a very short life: just three to four weeks. However, the entire life cycle of a butterfly can range between 2 and 8 months, depending on the species. Some migratory butterflies, such as the North American Monarch, can live as long as 7 to 8 months in one generation.
10. The Giant Swallowtail Butterfly, as its name implies, is one of the biggest butterflies, with a wing spread of four to seven inches. The female is once again bigger than the male. It too is found throughout North America and sometimes as far south as South America. These butterflies are called “swallow" because they have long tails on their hind wings that resemble the long, pointed tails of the birds known as swallows.
Be sure to get outside this summer and look around for butterflies and other wildlife in your backyard. If you see a butterfly but aren't sure about the species, you can consult this handy identification guide.
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Wisdom the mōlī, or Laysan albatross, is the oldest wild bird known to science at the age of at least 70. She is also, as of February 1, a new mother.
<div id="dadb2" class="rm-shortcode" data-rm-shortcode-id="aa2ad8cb566c9b4b6d2df2693669f6f9"><blockquote class="twitter-tweet twitter-custom-tweet" data-twitter-tweet-id="1357796504740761602" data-partner="rebelmouse"><div style="margin:1em 0">🚨Cute baby alert! Wisdom's chick has hatched!!! 🐣😍 Wisdom, a mōlī (Laysan albatross) and world’s oldest known, ban… https://t.co/Nco050ztBA</div> — USFWS Pacific Region (@USFWS Pacific Region)<a href="https://twitter.com/USFWSPacific/statuses/1357796504740761602">1612558888.0</a></blockquote></div>
By Hui Hu
Winter is supposed to be the best season for wind power – the winds are stronger, and since air density increases as the temperature drops, more force is pushing on the blades. But winter also comes with a problem: freezing weather.
Comparing rime ice and glaze ice shows how each changes the texture of the blade. Gao, Liu and Hu, 2021, CC BY-ND
Ice buildup changes air flow around the turbine blade, which can slow it down. The top photos show ice forming after 10 minutes at different temperatures in the Wind Research Tunnel. The lower measurements show airflow separation as ice accumulates. Icing Research Tunnel of Iowa State University, CC BY-ND
While traditional investment in the ocean technology sector has been tentative, growth in Israeli maritime innovations has been exponential in the last few years, and environmental concern has come to the forefront.
theDOCK aims to innovate the Israeli maritime sector. Pexels<p>The UN hopes that new investments in ocean science and technology will help turn the tide for the oceans. As such, this year kicked off the <a href="https://www.oceandecade.org/" target="_blank" rel="noopener noreferrer">United Nations Decade of Ocean Science for Sustainable Development (2021-2030)</a> to galvanize massive support for the blue economy.</p><p>According to the World Bank, the blue economy is the "sustainable use of ocean resources for economic growth, improved livelihoods, and jobs while preserving the health of ocean ecosystem," <a href="https://www.sciencedirect.com/science/article/pii/S0160412019338255#b0245" target="_blank" rel="noopener noreferrer">Science Direct</a> reported. It represents this new sector for investments and innovations that work in tandem with the oceans rather than in exploitation of them.</p><p>As recently as Aug. 2020, <a href="https://www.reutersevents.com/sustainability/esg-investors-slow-make-waves-25tn-ocean-economy" target="_blank" rel="noopener noreferrer">Reuters</a> noted that ESG Investors, those looking to invest in opportunities that have a positive impact in environmental, social and governance (ESG) issues, have been interested in "blue finance" but slow to invest.</p><p>"It is a hugely under-invested economic opportunity that is crucial to the way we have to address living on one planet," Simon Dent, director of blue investments at Mirova Natural Capital, told Reuters.</p><p>Even with slow investment, the blue economy is still expected to expand at twice the rate of the mainstream economy by 2030, Reuters reported. It already contributes $2.5tn a year in economic output, the report noted.</p><p>Current, upward <a href="https://www.ecowatch.com/-innovation-blue-economy-2646147405.html" target="_self">shifts in blue economy investments are being driven by innovation</a>, a trend the UN hopes will continue globally for the benefit of all oceans and people.</p><p>In Israel, this push has successfully translated into investment in and innovation of global ports, shipping, logistics and offshore sectors. The "Startup Nation," as Israel is often called, has seen its maritime tech ecosystem grow "significantly" in recent years and expects that growth to "accelerate dramatically," <a href="https://itrade.gov.il/belgium-english/how-israel-is-becoming-a-port-of-call-for-maritime-innovation/" target="_blank" rel="noopener noreferrer">iTrade</a> reported.</p><p>Driving this wave of momentum has been rising Israeli venture capital hub <a href="https://www.thedockinnovation.com/" target="_blank" rel="noopener noreferrer">theDOCK</a>. Founded by Israeli Navy veterans in 2017, theDOCK works with early-stage companies in the maritime space to bring their solutions to market. The hub's pioneering efforts ignited Israel's maritime technology sector, and now, with their new fund, theDOCK is motivating these high-tech solutions to also address ESG criteria.</p><p>"While ESG has always been on theDOCK's agenda, this theme has become even more of a priority," Nir Gartzman, theDOCK's managing partner, told EcoWatch. "80 percent of the startups in our portfolio (for theDOCK's Navigator II fund) will have a primary or secondary contribution to environmental, social and governance (ESG) criteria."</p><p>In a company presentation, theDOCK called contribution to the ESG agenda a "hot discussion topic" for traditional players in the space and their boards, many of whom are looking to adopt new technologies with a positive impact on the planet. The focus is on reducing carbon emissions and protecting the environment, the presentation outlines. As such, theDOCK also explicitly screens candidate investments by ESG criteria as well.</p><p>Within the maritime space, environmental innovations could include measures like increased fuel and energy efficiency, better monitoring of potential pollution sources, improved waste and air emissions management and processing of marine debris/trash into reusable materials, theDOCK's presentation noted.</p>
theDOCK team includes (left to right) Michal Hendel-Sufa, Head of Alliances, Noa Schuman, CMO, Nir Gartzman, Co-Founder & Managing Partner, and Hannan Carmeli, Co-Founder & Managing Partner. Dudu Koren<p>theDOCK's own portfolio includes companies like Orca AI, which uses an intelligent collision avoidance system to reduce the probability of oil or fuel spills, AiDock, which eliminates the use of paper by automating the customs clearance process, and DockTech, which uses depth "crowdsourcing" data to map riverbeds in real-time and optimize cargo loading, thereby reducing trips and fuel usage while also avoiding groundings.</p><p>"Oceans are a big opportunity primarily because they are just that – big!" theDOCK's Chief Marketing Officer Noa Schuman summarized. "As such, the magnitude of their criticality to the global ecosystem, the magnitude of pollution risk and the steps needed to overcome those challenges – are all huge."</p><p>There is hope that this wave of interest and investment in environmentally-positive maritime technologies will accelerate the blue economy and ESG investing even further, in Israel and beyond.</p>
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