Although birds use their feathers for flight, some of their feathers are for other purposes.

And the more birds are exposed to light, the more active they are at night.

And why do cats give dead birds to their owners?

As recently reported in The Auk: ornithological advances, some mother birds may teach their young to sing even before they hatch?

Biologist Kristin says the plan is to see how the birds respond to the multi-colored road this summer.

But when it comes to embryonic learning (胎教), birds could rule the roost.

California condors are north America's largest birds, with wind-length of up to 3 meters.

David Dominoni, of Glasgow university, said that light from street lamps, takeaway signs and homes is affecting the birds' biological clocks, leading to them being wide awake when they should be asleep.

Dr Dominoni, who is putting cameras inside nesting boxes to track sleeping patterns, said lack of sleep could put the birds' health at risk.

Embryonic learning helps mother birds to identify the baby birds which fit the environment better.

For a time, a few birds survived under human care.

He began studying them, trying to learn the differences between the birds and noticing their different behaviors.

He had hoped to sell more papers tonight to make more money to buy a cake for his mother and some seeds for his bird.

He thought of his bird with no seeds and the cake he wanted to buy for his mother, but was determined that he would not tell a lie.

Here is a graph that charts how far a bird flies during the first five days of its spring migration see graph 2.

Here is a piece of news for bird lovers.

However, some birds thrive in noisy environments.

I have people coming to me saying, you are the bird expert.

I saw bird watchers who spotted a bird, immediately looked it up in field guides, and said, a \ruby-crowned kinglet\ and checked it off.

If I have the chance to attend the class, I'm going to cut out a bird.

If the line segment angled dawn, as between day 4 and day 5, it would mean that the bird flew fewer kilometers than the day before.

In addition, the team set up a separate experiment that suggested that the baby birds that most closely imitated their mom's voice were rewarded with the most food.

In the 18th and early 19teh centuries, passenger pigeons were the largest bird population in the US.

Like ancient sailors, birds can find their way using the sun and the stars.

Migrating at night, birds tend to collide with brightly lit tall buildings.

Never allow dogs or other pets to run freely in areas of nesting bird, other wildlife, or where signposted.

Now, electric shock training and medical treatment are helping to rescue these big birds.

Observe signs to approach nesting birds.

On a local level, the damage of the forest required by full-sun fields affects the area's birds and animals.

Tall poles, placed in large training areas, teach the birds to stay clear of electrical lines by giving them a painful but undeadly electric shock.

The bird covered the longest distance on day 3.

The bird watchers' behavior shows that they care only about the names of birds.

The birds' health might be damaged.

The birds were shipped to large cities and sold in restaurants.

The change in how coffee is grown from shade-grown production to full-sun production endangers the very existence of, certain animals and birds, and even disturbs the world's ecological balance.

The line segment goes up between Day 1 and Day 2, which means that the bird flew farther on Day 2.

The shade of the forest trees provides a home for birds and other special that depend on the trees' flowers and fruits.

The writer mentions birds and frogs to show how light pollution affects animals.

Then he found that the animals around were very beautiful, and he particularly enjoyed observing the birds he saw.

Therefore, he painted the birds he observed a lot.

They are keen to see rare birds at the destination.

They no longer paid attention to the bird and never learned what it was doing.

This affects their nervous systems and ability to produce baby birds, and can lead to kidney failures and death.

To find out if the special quality was more widespread in birds, the researchers sought the red-backed fairy wren, another species of Australian songbird.

We are lucky now to have so many paintings of American birds by John Audubon.

When the eggs were hatched, the baby birds made the similar chirp to their mothers—a sound that served as their regular \Feed me!\ call.

When your cat drops a dead bird at your feet, she isn't bringing you a present.

\Young birds are often attracted to the warm road surface and get killed by the traffic.\ Biology student Hannah tells the broadcaster.

A decorated egg with a bird on it, given to a young married couple, is a wish for children.

Dr William Bird suggests in his study that wild places may induce impulsive behaviour in people.

Learn five species of bird, five butterflies, five trees, five bird songs.

Bird lovers, both young and old, have already responded with excitement at the news.

Some fly very long distances, including one kind of bird that flies from the remote north of the world, all the way to the distant south.

The birds will be encouraged to clean the park through the use of a small box that delivers a small amount of bird food.

Writing in the journal, the scientists describe how the storks from Germany were clearly affected by the presence of waste sites, with four out of six birds that survived for at least five months overwintering on rubbish dumps in northern Morocco, instead of migrating to the Sahel.

While many birds travelled along well-known routes to warmer climates, others stopped short and spent the winter on landfills, feeding on food waste, and the multitudes of insects that thrive on the dumps.

They have seriously polluted the places where birds spend winter.

They have led some birds to give up on migration.

They have changed the previous migration habits of certain birds.

The birds can easily eat pieces of plastic or rubber hands and they can die, said Flack.

Migrating birds affect ecosystems both at home and at their winter destinations, and disrupting the traditional routes could have unexpected side effects.

Landfill sites on the Iberian Peninsula have long attracted local white storks, but all of the Spanish birds tagged in the study flew across the Sahara Desert to the western Sahel.

In the short-term, the birds seem to benefit from overwintering ( ' , 过冬) on rubbish dumps.

For the birds, it's a very convenient way to get food.

Andrea Flack of the Max Planck Institute found that birds following traditional migration routes were more likely to die than German storks that flew only as far as northern Morocco, and spent the winter there on rubbish dumps.

Way up north in the Canadian Arctic, seabirds are picking up dangerous chemicals in the ocean and delivering them to ponds near where the birds live.

Some 10,000 pairs of the birds, called fulmars, a kind of Arctic seabird, make their nests on Devon Island, north at the Arctic circle.

People who live, hunt or fish near bird coloniesneed to be careful, the researchers say, The birds don’t mean to cause harm, but the chemicals they carry can cause major problems.

Other birds unknowingly carry seeds that cling to them for the ride.

In ponds closest to the colony, the result showed there were far more pollutants than the ponds less affected by the birds.

Canadian scientists have found a worrisome new example of the power that birds have to spread stuff around.

Birds flock together, fish school together, cattle herd together.

He captures birds only to let them go when he realizes the cruelty involved.

The bird Clark's nutcracker, for example, hides up to 100, 000 seeds per year, up to 30 kilometers away from the seed source, and has a very close symbiotic(共生的) relationship with several pine species, most 32 notably the whitebark pine.

We have no land ethic yet, but we have at least drawn nearer the point of admitting that birds should continue as a matter of intrinsic right,regardless of the presence or absence of economic advantage to us.

Scientists jumped to the rescue with some distinctly shaky evidence to the effect that insects would eat us up if birds failed to control them.

A parallel situation exists in respect of predatory mammals and fish-eating birds.

Think of those fleeting moments when you look out of an aeroplane window and realise that you are flying, higher than a bird.

Beavers build dams and birds make nests.

\The federal government is giving responsibility for managing the bird to the same industries that are pushing it to extinction,\ says biologist Jay lininger.

Biologists estimate that as many as 2 million lesser prairie chickens一-a kind of bird living on stretching grasslands - once lent red to the often grey landscape of the mid-western and southwestern United States.

The federal government is giving responsibility for managing the bird to the same industries that are pushing it to extinction.

They had pushed the agency to designate the bird as \endangered, \ a status that gives federal officials greater regulatory power to crack down on threats.

Under the plan, for example, the agency said it would not prosecute landowners or businesses that unintentionally kill, harm, or disturb the bird, as long as they had signed a range-wide management plan to restore prairie chicken habitat.