How was the program Animal World filmed?

Generally, CCTV animal world films are bought, and few CCTV films are made by themselves.

The people who take these pictures are not only amateurs or professional zoologists who take pictures in their own jobs, because people like this job and live in the wild all the year round. There are also photographers who shoot such works for TV, but it rarely seems to be the second job of the above two ... he hides the camera and puts it in places where animals haunt.

Wait for the animals to pass by, and then cut off the parts where the animals appear.

Some shots are taken by focusing and tracking animals from a distance.

Foreigners have advanced equipment, such as telephoto cameras, miniature cameras (as thin as thin lines), wireless sonar/remote control photography, and many shots that are very close to animals, such as those that fly with geese, are domesticated by people, and of course are close to humans; Of course, it does not rule out that some of them are made by computers.

I wonder if there is any program about elephants. In order to sneak a shot of the elephant's life, the camera can be disguised as a stone. ...