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We really love having you listen to RN but we need to let you know that we’ll be closing our subject podcasts. To keep hearing stories and interviews from RN, search for your favourite shows in the ABC Radio App or subscribe in your preferred podcasting app.

A Conservation International team has counted an average of 252 species of reef fish at each site in the waters around Atauro Island – more any other place on the planet. There is a push to protect the island, which is 24km north of Timor-Leste’s capital, Dili, with a view to developing an ecotourism industry.

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Honeybees aren't the only wildlife affected by pesticides – wild bees and butterflies also feel the effect. Wild bee image from www.shutterstock.com

Two separate studies from the United States and England, both published today, show evidence that populations of butterflies and wild bees have declined in association with increased neonicotinoid use.

Neonicotinoids, or neonics, are pesticides applied to crops as seed treatments or sprays. Neonics have high selective toxicity for insects, meaning they are more toxic to insects than mammals. When insects eat the treated plants, the pesticides affect the insects' health, behaviour and reproductive success.

While there have been few studies in the natural environment until now, concerns about the ecological impact of neonics, including their possible link to bee declines, led the European Union to restrict their use in 2013. EU scientists are currently reviewing the ban, with recommendations expected next year.

What do the new studies tell us?

In the US study, researchers looked at 40 years of butterfly data in northern California. They found that populations declined dramatically in the late 1990s. Smaller butterfly species that produced fewer generations each year were the most affected.

These declines were associated with increasing use of neonics across the region, beginning in the mid-1990s. The data for neonics usage was obtained from US government pesticide use databases.

This study is an important contribution to our understanding of how neonics affect non-target insects in the wild.

The butterfly data was collected from four sites monitored by the same person (an expert entomologist) for up to four decades. This level of data integrity is quite rare in modern ecological studies. Long-term consistency in the data collection means that many of the effects of different observer skills or collection efforts have been minimised.

The second study looked at wild bee populations in the UK. The researchers focused on oilseed rape that had been seed-treated with the pesticide. Rape is a common source of neonics in agricultural environments and is also a highly attractive floral resource for many wild bees and other pollinator insects.

This study also uses high-quality data. It is based on 18 years of data for 62 bee species collected by the Bees, Wasps and Ants Recording Society, a specialist UK entomological society, as well as pesticide use data from the UK government. The researchers show that, over time, the negative effects of neonics exposure for wild bees outweighed the benefits of the crop as a food resource.

They provide the first evidence that neonic seed treatments are associated with national-scale declines in wild bees at the community level. Populations of species that are known to forage regularly on rape were affected three times more than species not seen on rape flowers.

Out of the lab

These studies are important contributions to science. Most previous studies showing negative effects of neonics on non-target insects have been conducted under short-term field conditions, or controlled conditions in a laboratory, using commercially bred bees (mostly European honey bees or bumblebees).

The evidence from these studies shows that while individual bees may not die immediately after exposure to the pesticides, sub-lethal effects on behaviour and health can affect their ability to pollinate crops, and impact the success of the colony as a whole.

These short-term, controlled studies tell us a lot about the biological and physiological effects of neonics on managed colonies of particular bee species. But they can’t tell us how neonics affect wild insects under natural conditions, or how consistent exposure might affect populations of other insect species over time.

The evidence from the studies published today comes from decades of data collected under natural conditions before and after neonics were introduced to the environment. It shows that neonics could affect the long-term persistence of wild pollinator communities.

Importantly, these studies also show that the biological traits of different species influence how neonics affect them. This means that results from studies of one species (e.g. commercially bred honey bees) aren’t helpful to understand impacts on other wild species.

What does this mean for Australia?

There is very little evidence of how neonics affect bees, or other non-target insects, in Australia. The Australian Pesticides and Veterinary Management Authority published a report in 2014 summarising the impact of neonics on honey bees in Australia.

The report concluded that there was a lack of consensus on causes of honey bee declines in Europe and the US. It also stated that insecticides are not a significant issue in Australia, where honey bee populations haven’t declined as we have seen overseas.

However, it’s important to remember that a lack of scientific consensus on this issue exists because very little ecological evidence is available for scientists to answer these questions conclusively.

These new studies provide evidence from specific regions in the US and UK, so we can’t extrapolate the results to Australian conditions with certainty. However, they do leave us with an important reminder that long-term monitoring is essential when trying to understand ecological systems.

In Australia, neonics are approved for use as a seed treatment in a number of crops that are attractive to honey bees and other pollinator insects. This includes canola, corn, sunflower, cotton, kale and clover.

There are still major knowledge gaps in our understanding of these insecticides, but a recent review of evidence found that neonics can persist for years in the environment and affect biodiversity through multiple pathways.

Australia has over 1,800 native bee species, many of which are providing free pollination services to many Australian crops. Thousands of other beneficial insect species living on farms – like flies, wasps, beetles and butterflies – can also be important pollinators and natural enemies. However, it is impossible to know how neonics might affect them without more comprehensive ecological research.

Manu Saunders is affiliated with the Institute for Land Water & Society at Charles Sturt University. She is co-founder of the Wild Pollinator Count, a non-profit organisation aimed at wild pollinator conservation.

The large-scale, long-term decline in wild bees across England has been linked to the use of neonicotinoid insecticides by a new study.

The National Parks Service celebrates its 100th birthday in August. How have America’s natural wonders impacted your life? Share your stories and photos

For 100 years, the National Parks Service has been providing Americans and international visitors alike with unspoiled vistas – and vacations to match.

Ahead of the centennial on 25 August, we want to hear from you. Do you have a particularly memorable hiking adventure to tell us about? Or an undeniably beautiful shot of a waterfall or mountain range? Share your stories and photographs with us. We’ll feature a selection in our coverage.

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Natural range of critically endangered western swamp tortoise increasingly untenable owing to reduced rainfall

Twenty-four of Australia’s rarest tortoises have been released outside their natural range because climate change has dried out their remaining habitat.

The natural range of the critically endangered western swamp tortoise, Pseudemydura umbrina, has shrunk to two isolated wetlands in Perth’s ever-growing outer suburbs, and a herpetological expert, Dr Gerald Kuchling, said reduced rainfall and a lowered groundwater table made those areas increasingly untenable.

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Coastal village of Shishmaref, which is losing ground to rising sea levels, could become the first in the US to move over the threat of climate change

The residents of an Alaskan coastal village have begun voting on whether to relocate because of rising sea levels.

If they vote to move, the village of Shishmaref, just north of the Bering Strait, and its population of 650 people, could be the first in the US to do so because of climate change.

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Australia is renowned for its iconic wildlife. A bilby digging for food in the desert on a moonlit night, a dinosaur-like cassowary disappearing into the shadows of the rainforest, or a platypus diving for yabbies in a farm dam. But such images, though evocative, are rarely seen by most Australians.

As mammalogist Hedley Finlayson wrote in 1935:

The mammals of the area are so obscure in their ways of life and, except for a few species, so strictly nocturnal, as to be almost spectral.

For some species, our time to see them is rapidly running out. We know that unfortunately many native animals face considerable threats from habitat loss, introduced cats and foxes, and climate change, among others.

More than ever before, we need accurate and up-to-date information about where our wildlife persists and in what numbers, to help ensure their survival. But how do we achieve this in a place the sheer size of Australia, and with its often cryptic inhabitants?

How can we survey wildlife across Australia’s vast and remote landscapes? Euan Ritchie Technology to the rescue

Fortunately, technology is coming to the rescue. Remotely triggered camera traps, for example, are revolutionising what scientists can learn about our furry, feathered, scaly, slippery and often elusive friends.

These motion-sensitive cameras can snap images of animals moving in the environment during both day and night. They enable researchers to keep an eye on their study sites 24 hours a day for months, or even years, at a time.

The only downside is that scientists can end up with millions of camera images to look at. Not all of these will even have an animal in the frame (plants moving in the wind can also trigger the cameras).

This is where everyday Australians can help: by becoming citizen scientists. In the the age of citizen science, increasing numbers of the public are generously giving their time to help scientists process these often enormous datasets and, in doing so, becoming scientists themselves.

A camera trap records a leaping frog while a dingo takes a drink at the waterhole in the background. Jenny Davis What is citizen science?

Simply defined, citizen science is members of the public contributing to the collection and/or analysis of information for scientific purposes.

But, at its best, it’s much more than that: citizen science can empower individuals and communities, demystify science and create wonderful education opportunities. Examples of successful citizen science projects include Snapshot Serengeti, Birds in Backyards, School Of Ants, Redmap (which counts Australian sealife), DigiVol (analysing museum data) and Melbourne Water’s frog census.

Through the public’s efforts, we’ve learnt much more about the state of Africa’s mammals in the Serengeti, what types of ants and birds we share our cities and towns with, changes to the distribution of marine species, and the health of our waterways and their croaking inhabitants.

In a world where there is so much doom and gloom about the state of our environment, these projects are genuinely inspiring. Citizen science is helping science and conservation, reconnecting people with nature and sparking imaginations and passions in the process.

Australian wildlife in the spotlight

A fantastic example of this is Wildlife Spotter, which launched August 1 as part of National Science Week.

Researchers are asking for the public’s help to identify animals in over one million camera trap images. These images come from six regions (Tasmanian nature reserves, far north Queensland, south central Victoria, Northern Territory arid zone, and New South Wales coastal forests and mallee lands). Whether using their device on the couch, tram or at the pub, citizen scientists can transport themselves to remote Australian locations and help identify bettongs, devils, dingoes, quolls, bandicoots and more along the way.

A Torresian Crow decides what to do with a recently shed snake skin. Jenny Davis

By building up a detailed picture of what animals are living in the wild and our cities, and in what numbers, Wildlife Spotter will help answer important questions including:

• How many endangered bettongs are left?

• How well do native predators like quolls and devils compete with cats for food?

• Just how common are common wombats?

• How do endangered southern brown bandicoots manage to survive on Melbourne’s urban fringe in the presence of introduced foxes, cats and rats?

• What animals visit desert waterholes in Watarrka National Park (Kings Canyon)?

• What predators are raiding the nests of the mighty mound-building malleefowl?

An endangered southern brown bandicoot forages in vegetation on the outskirts of Melbourne. Sarah Maclagan

So, if you’ve got a few minutes to spare, love Australian wildlife and are keen to get involved with some important conservation-based science, why not check out Wildlife Spotter? Already, more than 22,000 people have identified over 650,000 individual animals. You too could join in the spotting and help protect our precious native wildlife.

Euan Ritchie receives funding from the ARC, and is involved with the South-central Wildlife Spotter project.

Jenny Davis receives funding from the ARC and is involved in the NT Wildlife Spotter project.

Sarah Maclagan is involved with the South-central Wildlife Spotter project.

Jenny Martin does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond the academic appointment above.

July was hotter than any month globally since records began – but some areas, such as the Middle East, suffer more than others

In Siberia, melting permafrost released anthrax that had been frozen in a reindeer carcass for decades, starting a deadly outbreak. In Baghdad, soaring temperatures forced the government to shut down for days at a time. In Kuwait, thermometers hit a record 54C (129F).

July was the hottest month the world has endured since records began in 1880, scientists have said, and brought a painful taste of the troubles people around the world may have to grapple with as global warming intensifies. Results compiled by Nasa showed the month was 0.84C hotter than the 1951-1980 average for July, and 0.11C hotter than the previous record set in July 2015.

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Second phase of new benchmark will cut equivalent of greenhouse gases emitted by electricity and power from all US residences in one year, officials say

US trucks will produce 10% less carbon dioxide and consume 10% less fuel within a decade under the last major plank of Barack Obama’s climate policy.

The second phase of a new benchmark for medium- and large-sized trucks will cut more than 1bn metric tonnes of carbon dioxide emissions and 2bn barrels of oil use, the Environment Protection Agency announced on Tuesday.

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Simon Jenkins writes that “To question China’s good intentions in financing the power station [at Hinkley Point] is silly. It is a French-built plant, and the idea that Beijing might contrive to embed and then activate some doomsday bug is absurd” (Trade with China is a good thing. But Hinkley Point is a dud, 11 August).

Not that absurd. The China General Nuclear Group (CGN), which is involved in financing Hinkley Point, expects to build a new nuclear station with its own reactor at Bradwell in return for its involvement at Hinkley. This was agreed by David Cameron and Xi Jinping last October.

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Researchers have captured rare footage of the stubby squid – a purple-colored species with large eyes – during an exploration voyage off Santa Monica, California. The somewhat rare species, which looks like a cross between an octopus and squid, spends its life on the seafloor, burrowing into the sand for camouflage and using its large eyes to spot incoming prey, such as shrimp and small fish

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Southern Louisiana has been ravaged by a slow-moving rainstorm that the National Weather Service has called a ‘1,000-year’ disaster. Thousands of people have evacuated their homes and at least eight people are dead as of Tuesday morning. The historic storm began in the corner of Florida’s gulf coast in the first week of August

• Louisiana begins recovery from devastating storm – in pictures
  

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The large-scale, long-term decline in wild bees across England has been linked to the use of neonicotinoid insecticides by a new study.

Species that feed most on the bright yellow flowers of the crop treated with controversial neonicotinoids have fallen by as much as 30%

Pesticides used on oilseed rape crops, whose bright yellow flowers have become an increasingly common sight across the British countryside, are harming native populations of wild bees, scientists have conclusively proved.

Species that feed most on the flowers of the now-profitable cash crop used for vegetable oils and animal fodder are down by as much as 30%, according to the wide-ranging study published in the journal Nature.

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Former US Secretary of Defence, William J. Perry, warns that the risk of nuclear catastrophe is greater than it was during the Cold War and is growing every year. 

Multibillion-pound Hornsea Project Two, 55 miles off Grimsby coast, would see 300 turbines span an area five times size of Hull

The second phase of the world’s biggest offshore windfarm is set to be built off the Yorkshire coast after being approved by ministers.

The multibillion-pound Hornsea Project Two would see 300 turbines – each taller than the Gherkin – span an area five times the size of Hull.

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China successfully launches its first quantum-enabled satellite, named after the ancient Chinese scientist and philosopher Micius.

National Oceanic and Atmospheric Administration to classify disaster as the eighth flood considered to be a once in every 500-year event in the US in a year

The historic and devastating floods in Louisiana are the latest in a series of heavy deluges that some climate scientists warn will become even more common as the world continues to warm.

On Tuesday, the National Oceanic and Atmospheric Administration (Noaa) is set to classify the Louisiana disaster as the eighth flood considered to be a once in every 500-year event to have taken place in the US in little over 12 months.

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