logo
Antarctic leopard seals perform unique songs for hours, study finds

Antarctic leopard seals perform unique songs for hours, study finds

NZ Herald6 days ago
Listening to articles is free for open-access content—explore other articles or learn more about text-to-speech.
Male leopard seals sing songs structured like nursery rhymes. Photo / Jamie Quirk
When male leopard seals dive down into icy Antarctic waters, they sing songs structured like nursery rhymes in performances that can last up to 13 hours, scientists say.
An Australian-led team of researchers compared the complexity of the songs composed by the aquatic mammals to those of other animals – as well as human musicians like the Beatles and Mozart.
Lucinda Chambers, a bioacoustics PhD student at Australia's University of New South Wales, told AFP that people are often surprised when they hear the 'otherworldly' hoots and trills sung by leopard seals.
'It kind of sounds like sound effects from an 80s sci-fi movie,' said the lead author of a new study in the journal Scientific Reports.
During the spring breeding season, male leopard seals dive underwater and perform their songs for two minutes before returning to the surface for air. They then repeat this performance for up to 13 hours a day, according to the study.
Orange background

Try Our AI Features

Explore what Daily8 AI can do for you:

Comments

No comments yet...

Related Articles

Illusionist's personal new show
Illusionist's personal new show

Otago Daily Times

time5 hours ago

  • Otago Daily Times

Illusionist's personal new show

Anthony Street brings his magic and illusion show to Dunedin's Regent Theatre this Friday night. Photo: supplied Internationally renowned Australian illusionist and magician Anthony Street has returned to New Zealand this winter with his most personal show yet. Street brings his all-ages "Magic & Illusion Spectacular" tour to Dunedin's Regent Theatre this Friday at 7pm. Raised in Victoria, Australia, Street first fell in love with Irish dance as a teenager and worked his was on to the world stage in Lord of the Dance. But his obsession with magic began much earlier, when he was eight and saw a simple rope trick at a local carnival that changed everything. In 2011, he brought his love of dance and magic together with Celtic illusion, and has since created other large-scale dance shows. But this time, the "Magic & Illusion Spectacular" show is about Street himself, his childhood dreams, the challenges behind the scenes and the joy of bringing real magic into people's lives. The show features sleight-of-hand, mind-reading, levitation and escapes, with personal storytelling, family-friendly humour and plenty of audience participation. 'I've been bringing shows to New Zealand since 2016, and it honestly feels like a second home' Street said in a statement. 'The people here are some of the nicest I've ever met, open, warm, and totally up for the ride. 'It's not just about grand-scale illusions any more. 'It's about connection. It's about those close-up, intimate moments that feel even more impossible." — Allied Media

Air Force pulls off 'courageous' medical evacuation from Antarctica
Air Force pulls off 'courageous' medical evacuation from Antarctica

1News

time17 hours ago

  • 1News

Air Force pulls off 'courageous' medical evacuation from Antarctica

The Royal New Zealand Air Force carried out a "complex" and "high-risk" medical evacuation from Antarctica overnight. One US diplomat described the successful mission as "daring, dangerous, and deeply courageous". The evacuation from McMurdo Station — the largest research station on the continent, located on Ross Island's southern tip — was requested by the US National Science Foundation because staff were unable to get the care they needed in Antarctica. A C-130J Hercules was sent from Auckland to Christchurch on Sunday while the crew waited for a gap in the weather. The crew decided to fly yesterday afternoon and worked through the night. Defence Force staff on the ground in Antarctica. (Source: Supplied) ADVERTISEMENT One person who required urgent care, as well as two others who needed medical attention, were picked up by the Air Force from the Antarctic base. Air Component Commander Air Commodore Andy Scott said the crew contended with challenging conditions, landing a large aircraft in freezing temperatures. The crew needed night vision goggles in the extreme darkness. The morning's headlines in 90 seconds, new report into submersible implosion, body found in Auckland park, and mixed injury news for the Warriors. (Source: 1News) On the ground, staff at the base had to create a runway to ensure the ice was suitable for landing. 'Although they determine it is safe, it's still an extremely challenging environment to fly in on night vision goggles due to the extreme weather conditions, which are highly changeable at this time of year and makes accurate forecasting a challenge," Scott said. Pilots needed to make a complex and high risk landing. (Source: Supplied) 'This, coupled with there being no airfields available to divert to once the aircraft is past a certain point south adds to the risk, so these missions are not taken lightly." ADVERTISEMENT Once on the ice, the plane's engines remained running to keep them warm while refuelling, known as "hot refuelling". Including the short time on the ice, the whole operation took around 19.5 hours. US Embassy Chargé d'Affaires Melissa Sweeney said the crew executed the mission "flawlessly". A member of the RNZAF at McMurdo Station. (Source: Supplied) 'This required absolute precision. It was daring, dangerous, and deeply courageous. This is the kind of mission that tests every ounce of skill and bravery. The Royal New Zealand Air Force delivered, just as they always do.' The aircraft flew back to New Zealand with Defence Forece medical personnel, including a doctor, on board to care for the patients. The flight touched down in Christchurch this morning, with those evacuated treated in Christchurch. ADVERTISEMENT Sweeny said the US was "so very grateful" to the RNZAF, saying the operation "brought hope in the middle of the Antarctic night". RNZAF personnel on the ground in Antarctica. (Source: Supplied) "Their skill and readiness are truly world-class. 'Only the best crews can pull off something like this, and the Royal New Zealand Air Force proved, again, that they're among the very best. This isn't luck, it's professionalism, planning, and a level of capability that few can match.' Similar missions were successfully executed by the Royal New Zealand Air Force in 2021 and 2024. McMurdo Station was home to up to 1100 people a week during the summer months, and up to 200 a week during winter.

Sleepy birds, quiet dawns: how noisy, bright city nights disrupt and change birdsong
Sleepy birds, quiet dawns: how noisy, bright city nights disrupt and change birdsong

RNZ News

time21 hours ago

  • RNZ News

Sleepy birds, quiet dawns: how noisy, bright city nights disrupt and change birdsong

By Juli Gaviraghi Mussoi* of Birds' vocalisations are extraordinarily diverse. Photo: 123RF / AFP / Supplied Janice McKenna, David Pietzsch, Tui de Ray, George Hobson Analysis: We've all had a bad night's sleep, with a snoring partner, a crying baby or neighbours having too much fun. Sleep disturbances are common and have unpleasant consequences the day after, including feeling unmotivated and struggling to communicate. But it turns out we are not alone in this. Our new study reveals birds also suffer when their sleep is disrupted , and it shows in their singing. Birds' vocalisations are extraordinarily diverse . They range from simple calls, like a chicken cluck, to complex mimicry of other sounds, sometimes even human voices. These vocalisations are important for birds to share information about themselves and their surroundings. Calls are usually short and simple. They are often used for social communication, such as signalling danger or food, for kin recognition or to maintain social bonds. Songs are more complex and melodious and are used to attract mates, protect a territory or claim a new one. To produce such sounds, birds must coordinate several body systems, including many parts of the brain, lungs and throat muscles. Because vocalisations are intricate and require precise timing, they are susceptible to errors. In many species, birds that sing more frequently and with a greater complexity can attract better mates and defend territories. Therefore, a poor-quality song can seriously affect a bird's ability to reproduce and survive. Scientists have confirmed that all animals studied so far need sleep. This ranges from jellyfish and worms to whales and birds. Many animals spend a large proportion of their lives sleeping, with some, such as bats, being reported to sleep up to 20 hours per day. But sleep quality is increasingly compromised by urbanisation. With ever-expanding cities, disturbances such as light at night, noise pollution and introduced predators are common even in once remote areas. This means many birds live and sleep in highly disturbed environments. The Auckland Harbour Bridge lit up. Photo: Caleb Shong/ Unsplash Studies show birds that experience noise and light pollution sleep less, wake up more often and have less intense sleep. Just like for humans, sleep is important for birds for brain development, memory, learning, motivation, stress levels, cognition and communication. In our research, we focused on common mynas to explore what happens to birds' vocalisations when they don't get enough sleep. A myna bird. Photo: 123 RF We measured the amount and complexity of their songs and calls after a normal night of sleep versus disturbed nights. After just one bad night of sleep, common mynas sang fewer and less complex songs. They also spent more time resting during the day. This suggests the birds were less motivated to sing the day after and prioritised napping instead. In a previous study with Australian magpies, we found a similar result. Magpies sang less and even lost interest in eating their favourite treat after one night of sleep deprivation. We also tested whether half a night of sleep disturbances (either first or second half) was enough to affect common mynas' vocal behaviour and activity and found that it was. Mynas sang less and rested more after even half a night's disrupted sleep. Interestingly, birds disturbed in the first half of the night sang less than those disturbed in the second half, though a full night of disruption still had the strongest effect. Beyond singing, we found their calls also changed. Sleepy common mynas produced longer and lower pitched calls. Since these calls are used for recognition and social communication, the changes could affect how these highly social birds interact. Our findings reveal that even short-term sleep disturbances can affect how much and how well birds vocalise. But in nature, sleep disruption is rarely a one-off event. Light and noise pollution are chronic issues, present year-round. This means the quality of birds' songs and calls is likely to be constantly compromised. This raises concerns about the impact urbanisation might be having on bird communication, reproduction and survival. A tui Photo: Aneta Foubikova/ Unsplash While common mynas are an invasive species in most parts of the world and are well adapted to urban environments, native species are likely to be less able to cope with sleep disruption driven by urbanisation. Urban centres can take steps to reduce night disturbances and improve birds' sleep patterns. This includes increasing the number of safer and quieter roosting areas, such as trees and urban parks. It could also mean eliminating unnecessary lighting or using dimmers and downward-facing, warm lights. Restrictions on heavy or highly modified vehicles and the use of fireworks would lower noise pollution at night to protect natural sleep patterns of the wildlife we share our cities with. * Juli Gaviraghi Mussoi is a Lecturer in Ecology, at the University of Waikato. This article was first published by The Conversation .

DOWNLOAD THE APP

Get Started Now: Download the App

Ready to dive into a world of global content with local flavor? Download Daily8 app today from your preferred app store and start exploring.
app-storeplay-store