In a first glance, it is seen as birds fly in V shape to follow their leader but in reality, it's all about saving energy.

Photos shared to social media claim to depict a swarm of starlings flying through the air often, incredibly, in the shape of ...

If birds left tracks in the sky, what would they look like ... so must a pattern form in the wake of a flying bird. But of course birds in flight leave no trace—at least none visible to the ...

They also have to closely follow the flying schedules ... These are the men behind the action in the sky,” the officer stated.

The massive annual spring migration of America's birds – millions of them – is underway. Here's how to follow along at home.

If the wind is blowing behind them, the birds fly high up in the sky where the wind will increase their speed. Do birds migrate to Northern Ireland? Birds do migrate to Northern Ireland!

And with binoculars, you can easily see birds that are flying high in the sky or feeding up in the treetops. Many families have a pair of binoculars that are used at sporting events or concerts.

"On a big night in the spring, you're talking 450 to 500 million birds flying under cover of darkness ... some at altitudes as high as 15,000 feet, and aren't visible to the naked eye.