This group of pics (the butterfly) I took 20 shots and kept 4. When I first started I would take many, many, many and keep few. A single trip to the zoo I usually take about 500 shots, many of those I start taking farther away and keep taking as I get closer. I start taking futher out so I KNOW I get something, but will stalk and slowly go closer while still shooting in case I get something better, then I just delete the ones that I don't like.