These are all very nice. I especially like the last one; it gives a sense that the bird is enjoying the last bit of warmth and light before sunset. You might consider opening up the blacks to give a bit more detail.
Very nice shots, Birdie. How did you go from macro to the long glass? I'm curious because I've started shooting with an old manual focus 400mm Nikkor strapped to my film cameras and I'm loving it. Can't really afford the high end AF stuff right now. Would love to be able to shoot an AF 400mm f2.8. Just for grins, ya know?