"Photography is putting one's head, one's eye and one's heart on the same axis." – Henri Cartier-Bresson

You cannot describe better what I am trying to do in photography then did Henri Cartier-Bresson.
As a nature photographer, I first of all need my head for planning and preparing my images. This involves intimate knowledge about my subjects, e.g. animal behaviour, reproduction cycles, habitat, but also climate and weather issues. I need to pre-visualize what kind of equipment I will probably need for the given subject.
Once I am out there, I approach my subject very carefully, trying not to disturb. This might involve setting up a hide or just staying out of the comfort zone. What I like most is when I slowly gain the trust of an animal and come to a state where it accepts me being close.
I then try to be sensitive to what happens around me and keep my head, my eyes and my heart open. What is the animal doing, what will it probably do next, from which angle comes the light, what kind of light, do I have to change equipment, do I have to change position, does the scene evoke emotions in me, how can I catch those in my image?
Nature is never standing still, it constantly evolves and moves. I try to include this vitality into my images, working with various techniques like panning and long exposure times.
It's about technique, sure. It's also about knowing your subject. But most important, it's about letting your heart being touched by nature.

Nature is not standing still, I am not standing still, and so these words are but a snapshot during an ongoing long journey. That is what makes nature photography so fascinating for me.