You will find hardly any improvising on camera anywhere in my films. It's very structured, but it's all worked out from elaborate improvisations over a long period, as you know.
It is the duty of the State to educate, and the right of the people to demand education.
A large wildlife book, start to finish, could take one to two years, but then I would expect to get several good (nature) magazine features off the back of this, plus of course a lot of stock.