عربي English Türkçe اردو فارسى
Logo
Latest News
Varieties

Why Seagulls are the Noisiest among Birds?

A seagull picks up crumbs near the harbour in Sydney. Photo: AFP
A seagull picks up crumbs near the harbour in Sydney. Photo: AFP
TT
TT

Why Seagulls are the Noisiest among Birds?

A seagull picks up crumbs near the harbour in Sydney. Photo: AFP
A seagull picks up crumbs near the harbour in Sydney. Photo: AFP

Once the domain of the seaside, seagulls are becoming more commonplace inland now – with the number of urban gull colonies in the UK having doubled over the past couple of decades.

Councils as far as 40 miles from the sea have been warning about the birds in recent years, which are believed to be attracted to urban areas because of the abundance of food waste. Aside from being potentially aggressive, they can also be pretty noisy, even more so at this time of year. Just why are seagulls so loud? There are a number of reasons why seagulls make a whole lot of noise – although one of the main factors is to protect their nests from potential predators. Seagulls are, for obvious reasons, very protective of their young, and will make as much noise as possible to ward folks off their nests, according to The Metro.

Since they tend to build these in high-up environments, they can often be close to roofs or near the windows of houses, bringing them into closer contact with people, which can add to the din as they attempt to ward intruders off.

Meanwhile, their offspring also add to the din, calling to their parents to be fed, resulting in the adult gulls trying to gather as much food as they can for their young – which in turn can lead to them becoming more vicious as well as making a lot of noise. Seagulls can be particularly loud at this time of year because their chicks are getting ready to leave the nest. It is also mating season for the birds – which runs from April until September – as well as nesting season, which begins a month earlier.

Seagulls tend to return to the same nesting site every year, with pairs of birds building nests from twigs, grass, straw, paper and anything else they can find – while they will also mate several times a year to ensure success in producing a new brood.

Gulls normally lay eggs around April or May time, which hatch a few weeks later – and while their young normally take a few years to begin breeding their own families, they tend to return to the same nesting site when they do.

The Royal Society for the Protection of Birds (RSPB) says on its website that the best course of action with a seagull's nest is to leave it alone – while the best way of discouraging gulls from nesting near your property is to reduce available food sources and attractiveness of nesting sites.

Most Viewed

 
 
Varieties

Scientists Seek Miracle Pill to Stop Methane Cow Burps

A cow that's part of study on reducing methane emitted by cow burps stands in an exclosure at UC Davis in Davis, California on October 23, 2024. (AFP)
A cow that's part of study on reducing methane emitted by cow burps stands in an exclosure at UC Davis in Davis, California on October 23, 2024. (AFP)
TT
TT

Scientists Seek Miracle Pill to Stop Methane Cow Burps

A cow that's part of study on reducing methane emitted by cow burps stands in an exclosure at UC Davis in Davis, California on October 23, 2024. (AFP)
A cow that's part of study on reducing methane emitted by cow burps stands in an exclosure at UC Davis in Davis, California on October 23, 2024. (AFP)

A scientist guides a long tube into the mouth and down to the stomach of Thing 1, a two-month-old calf that is part of a research project aiming to prevent cows from burping methane, a potent greenhouse gas.

Paulo de Meo Filho, a postdoctoral researcher at University of California, Davis, is part of an ambitious experiment aiming to develop a pill to transform cow gut bacteria so it emits less or no methane.

While the fossil fuel industry and some natural sources emit methane, cattle farming has become a major climate concern due to the sheer volume of the cows' emissions.

"Almost half of the increase in (global) temperature that we've had so far, it's been because of methane," said Ermias Kebreab, an animal science professor at UC Davis.

Methane, the second largest contributor to climate change after carbon dioxide, breaks down faster than CO2 but is more potent.

"Methane lives in the atmosphere for about 12 years" unlike carbon dioxide which persists for centuries, Kebreab said.

"If you start reducing methane now, we can actually see the effect on the temperature very quickly."

Filho uses the tube to extract liquid from Thing 1's rumen -- the first stomach compartment containing partially digested food.

Using the rumen liquid samples, the scientists are studying the microbes that convert hydrogen into methane, which is not digested by the cow but instead burped out.

A single cow will burp roughly 220 pounds (100 kilograms) of the gas annually.

- 'Social critters' -

Thing 1 and other calves receive a seaweed-supplemented diet to reduce methane production.

Scientists hope to achieve similar results by introducing genetically modified microbes that soak up hydrogen, starving methane-producing bacteria at the source.

However, the team proceeds cautiously.

"We can't just simply cut down methane production by removing" methane-making bacteria, as hydrogen could accumulate to the point of harming the animal, warned Matthias Hess, who runs the UC Davis lab.

"Microbes are kind of social critters. They really like to live together," he said.

"The way they interact and affect each other impacts the overall function of the ecosystem."

Hess's students test different formulas in bioreactors, vessels that reproduce microorganisms' living conditions in a stomach from movements to temperature.

- More productive cows -

The project is being carried out at UC Davis as well as UC Berkeley's Innovative Genomics Institute (IGI).

IGI scientists are trying to identify the right microbe -- the one they hope to genetically alter to supplant methane-producing microbes.

The modified microorganisms will then be tested at UC Davis in the lab and in the animals.

"Not only are we trying to reduce methane emissions, but you also increase the feed efficiency," said Kebreab.

"Hydrogen and methane, they are both energy, and so if you reduce that energy and redirect it to something else... we have a better productivity and lower emissions at the same time."

The ultimate goal is a single-dose treatment administered early in life, since most cattle graze freely and can't receive daily supplements.

The three research teams have been given $70 million and seven years to achieve a breakthrough.

Kebreab has long studied sustainable livestock practices and pushes back against calls to reduce meat consumption to save the planet.

While acknowledging this might work for healthy adults in developed nations, he pointed to countries like Indonesia, where the government is seeking to increase meat and dairy production because 20 percent of children under five suffer from stunted growth.

"We can't tell them to not eat meat," he said.