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.

the birds hop in front of the cars and place walnuts, which they picked from the adjoining trees, on the road. After the lights turn green again, the birds fly away and vehicles drive over the ...

But high-speed cameras show us what makes these birds perfect flying machines ... speed of this Anna’s hummingbird when it flies in front of different background patterns and colors projected ...