Balou's big day.

Balou's big day arrived the way first flights always do, on an ordinary afternoon that nobody planned. Balou was a young white stork in the LifeTrack White Stork SW Germany study, ringed as a nestling and watched from the moment his transmitter was fitted. For weeks his points had stayed in a tight cluster around the nest, a bird testing its wings and not quite trusting them.

The long wait

A young stork spends a great deal of time standing. It stands in the nest while its parents bring food, it stretches one wing and then the other, and it watches the sky with the fixed attention of something learning by looking. Balou's data showed all of this, the stillness of a bird that was not yet sure what its own body was for.

The wind in the nest

Then came an afternoon with a good wind. Anyone who has watched young storks knows the moment, the half-spread wings, the lift of a gust, the way the bird rises an inch off the nest and comes down again, startled by its own lightness. The transmitter recorded none of that hesitation, only the same familiar dots. But the people watching could imagine it clearly enough.

The leaving

At some hour, Balou left. The points broke away from the nest and began to describe small circles, each one a little wider than the last, the signature of a bird on its first thermals. A stork does not need to be taught to climb warm air. It rises, tips its wings, and lets the column of heat carry it, and the ground falls away without effort. The first flight is not a leap so much as a letting go.

What the map showed

By evening Balou's dots had formed a loose ring around the nest, and by the next morning the ring had widened. He had gone a little further, then a little further still, the way a child on a bicycle pushes past the end of the street and then the next one. The big day had no audience and no applause, only a bird discovering the shape of its own life.

There would be harder days later, and longer crossings, and the slow turn south. But the first afternoon, the one when the wind came and Balou rose to meet it, was the day the bird became a traveller.