Heinz Sielmann, a German naturalist and documentary maker, would have celebrated his 101st birthday.
Heinz Sielmann, the late German naturalist and documentary maker, was hailed for his ingenious way of capturing elusive animal behaviour on film.
Often referred to as "Mr Woodpecker", Sielmann would have celebrated his birthday on June 2.
In his honour, Google is changing its logo in nine countries to a doodle, or illustration of him and nature.
Carpenters of the Forest
Born in Rheidt, Germany in 1917, Sielmann moved to East Prussia at a young age where his father opened a business of electrical materials.
He showed a fascination with the natural world from the first years of his life; he would often wake up early to observe birds.
At the age of 17, after being given his first camera, he started photographing his natural surroundings.
One of Sielmann's most notable works was Carpenters of the Forest, which captured one of Europe's most elusive birds, the woodpecker, in a way that had never been seen before.
Sielmann placed cameras inside woodpeckers' nests and in this way he ended up capturing intimate moments between parent and offspring.
The film was an enormous success globally. The BBC, which broadcast it, was inundated with requests to show it again. The programme's appreciation index matched that of a football final, according to British newspaper The Guardian.
The project was followed by a book about its making called My Year with the Woodpeckers. In it, Sielmann wrote: "Of all the animals that I have worked with, the woodpeckers are my favourites ... because I was able to find out many new facts about the biology of these birds."
