Macro lenses are great because they focus close and also will focus at infinity. When I used my 70-200mm zoom and 500D closeup lens for closeups, I'd have to keep taking the lens/filter on and off as the lens will only focus close up with the filter on.
Each of these three shots are cropped a bit, and the Canada Goose shot is cropped quite a bit. 100mm is not really a wildlife focal length.
|f/11, 1/180 sec., ISO 200|
|f/8, 1/750 sec., ISO 800|
|f/8, 1/500 sec., ISO 400|
This next two images are a single file followed by a four file HDR processed image with the normally exposed image file and files exposed -1, +1 and +2 EV.
|f/8, 1/350 sec., ISO 800|