Least Tern 2
Additional images can be viewed here.
The least Tern was diving for fish after hovering in front of a tree at San Juan Reserve in Irvine, CA.
The final image is a fairly strong crop of the original image of 85 MB from a 36.6 MP DSLR. The crop factor was incredible. This bird was at least a half mile away in clear weather.
The disadvantage of this particular high MP DSLR is the very slow frame rate of 4 FPS. There's no such thing as "spray and prey". You are shooting to capture a single image as the camera is just to slow to capture a continuous stream of images.
The above image shot was taken with a full frame, 36 MP DSLR with 300-800 F5.6 zoom lens on carbon fiber tripod.