Wildlife & Animal Behavior – B2 English Listening Exercise

9 darkness 10 grammar 11 squeaks 12 information

13 memory 14 identity 15 boat engines

16 software 17 teamwork 18 documentary

David Thorne: Hi everyone. My name is David Thorne, and I’ve spent the last fifteen years working as a marine biologist. Today, I’m here to talk to you about a fascinating topic that I’ve dedicated my career to: the incredible world of whale communication.

When we think about how animals interact, we tend to compare it to our own experiences. While humans rely heavily on sight to navigate the world and communicate, that’s not very practical underwater. Because light barely penetrates the deeper parts of the ocean, for whales living in almost total darkness, sound is their primary way of connecting with one another. Sound travels about four times faster in water than in air, making it the perfect medium.

Now, many animals communicate in some form. While animals like monkeys use basic sounds to warn each other of danger or show anger, they haven’t developed any kind of grammar, which is the defining feature of true language. Because of this, scientists generally don’t classify animal calls as a formal language.

But whales are an entirely different story. When we listen to whale songs, we might initially just hear low moans or long groans echoing through the water. However, when we analyze these recordings, we see that these songs are actually composed of rapid clicks and squeaks that travel through the water for thousands of miles. The complexity is truly mind-boggling.

In fact, you’d be amazed by the density of these acoustic signals. A single whale song can last up to twenty minutes and be repeated for hours. Scientists have discovered that the sounds produced by whales actually contain more information than human speech does in the exact same amount of time. It’s an incredibly efficient way to transfer data.

What’s more, these songs are not innate; they are learned. We used to think these songs were just repetitive loops programmed into their brains from birth. But we now know whales rely on an exceptional memory to learn and adapt these complex sequences over many years. A song will actually change and evolve over a mating season, and all the whales in the group will learn the new version.

Each pod, or family group of whales, sings a slightly different tune. While people often assume this is a way to claim a specific territory and keep rival groups away, it really serves as a clear badge of identity for the group. It allows whales to recognize their family members across vast expanses of the ocean, even if they’ve been separated for months.

Sadly, this intricate communication system is currently under threat from human activity. Natural phenomena like heavy rain or underwater earthquakes create some temporary interference, but it’s the continuous noise from boat engines that really drowns out their songs. This low-frequency hum makes it incredibly difficult for whales to hear each other, causing them a great deal of stress.

To combat this and understand the full impact, our research methods have had to evolve. Instead of just dropping standard microphones into the water and listening, our team now uses advanced software to separate the whales’ calls from the background noise of international shipping lanes. This allows us to map their communication networks accurately.

By isolating these sounds, we’ve learned a lot about their feeding habits, too. The songs become incredibly fast and rhythmic during a hunt, demonstrating a remarkable level of teamwork as they herd schools of fish together into tight balls before swimming up to consume them. It’s a highly coordinated ballet driven entirely by sound.

If you want to dive deeper into this subject and learn more about what we do, there are plenty of scientific books available. However, I’d strongly suggest checking out a brilliant documentary that features our audio recordings. It’s beautifully filmed and really brings the underwater acoustic world to life. Thank you for listening!

9 coral reefs 10 diving 11 grammar 12 nasal passages

13 rhythm 14 underwater microphone 15 hunting

16 signature whistle 17 noise pollution 18 rescue center

Aris: Hello everyone, my name is Aris Thorne, and I’m a marine biologist. I’m here today to talk to you about my research into animal communication, specifically focusing on a truly fascinating creature: the bottlenose whale.

Now, I haven’t always worked with whales. When I first started my career, most of my colleagues initially chose to focus on studying sharks, which was obviously very exciting. However, my own journey actually began by examining coral reefs, before I eventually moved into marine mammal research. It gave me a great foundation in ocean ecosystems.

My transition to studying whales happened quite unexpectedly. I didn’t first encounter a bottlenose whale while I was looking at satellite imagery in a lab, as you might expect these days. Instead, it happened during a routine diving expedition off the coast of Canada. I was completely captivated by their size and behavior in the wild.

As my research progressed, I became fascinated by how these animals talk to one another. Many animals communicate, of course. Birds use complex melodies, and primates have specific alarm calls to warn of danger. However, what sets human language apart, and what we are ultimately looking for in marine mammals, is the use of grammar. We’re still trying to figure out if whales use anything resembling it.

You see, producing sound underwater is a unique challenge. Whales don’t have vocal cords like we do, so they can’t make noises using their throats. Instead, they produce sounds by moving air through their nasal passages. It’s an incredibly efficient biological system for a marine environment.

What’s truly astonishing is how these sounds come across. The vocalizations of the bottlenose whale bear a striking resemblance to human speech patterns. You might think it’s the pitch or the volume that makes it sound so human. But actually, it’s the rhythm of their clicking sounds that mimics the way people talk. It’s almost as if you can hear a conversation happening just on the other side of a wall.

To capture these elusive sounds, you can’t just use standard recording gear. We initially considered attaching acoustic tags directly to the whales, but they are very sensitive creatures. In the end, we found that dropping an underwater microphone from the back of our boat gave us the clearest audio without disturbing the pod.

So, why do they make these complex sounds? Well, navigating through dark, freezing waters is certainly one reason they vocalize. But the primary purpose of these specific, rapid click patterns is actually hunting in the deep ocean. They use them to locate squid and other prey in complete darkness.

During our acoustic surveys, we made an incredible discovery regarding the young whales. We assumed they just copied the adults. But we learned that they don’t just inherit standard calls; each calf actually develops its own signature whistle, just like a human name, to identify itself to the rest of the pod. It’s a wonderful display of individual identity.

Sadly, these magnificent creatures face significant challenges in today’s oceans. While plastic waste is a tremendous issue globally and affects many species, for these highly acoustic animals, it is noise pollution from commercial shipping lanes that causes the most immediate harm. It interferes with their ability to find food and find each other.

Looking ahead, I have some big changes coming up. I won’t be returning to the university to teach next semester, even though I love being in the classroom. Instead, I’m taking up a position at a marine rescue center, where I hope to apply my acoustic research to directly help stranded whales. Thank you for listening!