A few days ago I was fortunate to be able to photograph geese and cranes from a relatively close distance using my vehicle as a blind. One of my favorites takes was a series of some geese taking flight. This image captured three of them taking off in succession, with a crane ducking to avoid getting hit. It's an intimate look at these birds I normally don't get to have.
D3 with 500vr, f/8, 1/2500, ev -0.67, iso 800 full framed uncropped.
Where I am, it is very easy to get close to the snow geese. They don't fly away from you. I've seen a guy walk right through a flock of thousands of snow geese that landed in a field. The snow geese simply made way for the him they didn't take flight. I once was able to move to less than 10 feet from them shooting with a 17-55mm lens on a D300. Again, the geese would simply turn and move away slowly.