I've attached two D7100 shots for possible inclusion in the Wildlife section of the D7100 book. The details of them are as follows:
Place taken: Frank Lake, Alberta Date: May 19/13 ISO: 800 Aperture: f/8 Shutter Speed: 1/800 sec. Lens: 80-400mm with 1.4 teleconverter and 1.3X crop mode (1100mm eff.)
Though my subject was not that close, I was able to get a significant amount of detail by employing a 1.4 teleconverter on my 80-400 lens. I took advantage of the 1.3 crop mode also, since I wanted to better isolate the bird. The male Yellow-headed Blackbirds at Frank Lake are quite abundant in May. They come to the lake before the females and establish a territory. The photo shows a male confidently surveying his domain in the marsh grass. This bird had evidently just been down to the water, since his feathers still appear wet.
Place taken: Frank Lake, Alberta Date: June 10/13 ISO: 1000 Aperture: f/5.6 Shutter Speed: 1/8000 sec. Lens: 70-300mm with 1.3X crop mode (500mm eff.)
These birds fly so swiftly and erratically that it is mostly a matter of luck as to whether one obtains a good shot. If one is persistent, and has appropriate settings, sometimes one is rewarded with a decent image. My photo shows one of the Barn Swallows at Frank Lake swooping out over a pond, adjacent to the observation blind. They are amazing flyers and are able to capture many insects as they maneuver over the water.