A flexible approach is required to get a wide range of good pictures. I love my long telephoto but also love my macro lens for close up work. I love the detail in the environment, bringing out small effects and magnifying them to reveal something interesting.
On this occasion I was able to benefit from another's observations. This Great Northern Diver had the habit of working a shoreline an hour of two after high tide. Get in position and wait. Its too far from home to go regularly but on the day we chose the right time was quite late in the day, however a bit of light shone through the clouds.
Like many birds from the Americas it was not shy and allowed us to reposition between dives. A great end to that day, enjoying close views.