rdubreuil wrote:
Not all that much, P900 shoots jpeg only, PP is limited.
For a camera like that, good light is the key - preferably light right on the subject's face. Otherwise, it's going to be difficult. While the P900 has a fantastic zoom, it is severely limited by both the inability to take a flash, the small sensor, and the lack of RAW files (although I'm surprised it doesn't do RAW).
In the first two images below, I was fighting heavy backlight with the dark faced howler monkeys. Although I normally don't do a lot of fill flash, it proved invaluable for retaining detail on the faces.
In the next image, I have howler monkey with a little light on his face. Thanks to the larger dynamic range of a full frame camera, I was able to pull up the shadows from the RAW file and retain detail, no flash required.
The same goes for the black bears. When I photograph black bears, I'm always thinking about the direction of the light. Hard shadows or dim conditions make getting good photo difficult. However, with a little illumination on their faces, it makes the job much easier. Couple that with a DSLR's larger sensor, and you have enough latitude to pull the shadows up if needed. The smaller sensor of the P900 works against you here, but under the right conditions should still be able to manage a decent shot.
The truth is, I think your camera is limiting you in this situation. A larger format DSLR or mirrorless would likely serve you better, but of course there's a LOT more expense, accessories, lenses, and weight involved.