The hardest thing for those of us who love animals is to see them suffering. This is a tribute to those wonderful people who work for the animals, who film and photograph the unimaginable. I have great admiration for you!
A very handy cheat sheet for beginners summarising the relationship between aperture, shutter speed and ISO. It also shows, in a simple manner, the impact of the adjustments made to aperture, shutter speed and ISO.