Read this blog by heejennwei
The blog is a translation, so some of it is initially weird to read(to us), but it still all makes sense.
Some of his arguments seem to be compelling.
I find it impossible to believe that such a small concentrated group of 'photographers' seem to have so much luck in being in the right place at the right time!
And if some of these images are stored in archives such as the Smithsonian and have won NatGeo photography awards for nature, then something really needs to be done about the practice.
Nature images should be captured of the natural world in it's natural state!
If course there will be the odd 'moment in time' when luck would have it that the fauna will have moved and captured at a precise moment that will look interesting as a photograph ... this is bound to happen at some point in time. But for the same photographer to happen upon such luck in a repetitive and consistent manner seems like such an unlikely proposition.
Faked/staged nature photos have no place in the genre of Nature photography .. and really shouldn't even exist at all.