I once had someone ask me if hunting wildlife or photographing wildlife is harder. The answer is that it depends on if you are photographing truely wild animals or ones that are accustomed to humans. If they are truely wild animals, then it's much harder to obtain great photographs than to simply kill one.
For example, when photographing whitetail deer the wind direction is crucial, just like with hunting. However, you also have to find a much larger shooting opportunity and the direction of the sun (something that's usually not a factor with hunting).
One of the most important things in wildlife photography is the direction of the sun, especially since most of the action occurs at dawn or dusk and you will not be able to see details on your subject without the direct sun. Figuring out which direction the sun is going to be at certain times is challenging.
You might be thinking, "big deal, the sun comes up in the east and sets in the west!" Well, it's not that easy, in fact it changes throughout the year and it's almost never exactly east and west.
So when I'm setting up my blind for an afternoon set up or when I'm in an area before sun up I need to know where the sun is going to be at certain times. I've searched online and was not able to find that kind of information but yesterday I did find a great app that can help. It's called Sun Seeker. I've tried it out and it's dead on accurate.