These guys definitely don't like people close to them ;) I happened to bring my Nikon Coolpix with me (it has a very modest telephoto on it). We were on a field trip with a park ranger who had the whole area to the dock gated off - I don't remember a word he said as I was too busy taking as many photos as I could of this beautiful bird. Very few made it as viable - that NECK! Within the time it took to push the button, the bird would extend or contract its neck - so funny! I have photos with a bird with no head in many and in others no bird at all ;) And the trek around the lake to capture more photos were all very blurry. I don't think they appreciate human interaction that much - preferring to be alone. Very skiddish birds and hard to photograph unless at a distance.