My sharpening for birds is really simple but it all depends on the tool chain you are using.
I do the sharpening in three steps:
1) Capture sharpening.
2) Creative sharpening.
3) Output sharpening.
Capture sharpening is where you remove the blur which is inherent in most digital captures this is caused by the way the photo sights are arranged and the anti-aliasing filter that is used to blur the stair step effect in straight lines and the moire in patterns. I do this step in my raw converter, these days I usually use Adobe Capture Raw and use the default sharpening or a bit less, this level of sharpening should be subtle and you shouldn't see it cause any artifacts.
Creative sharpening, is where you brush in were you want the sharpening, with birds I usually use highpass sharpening using the Light Right Studio sharpening toolkit, there very good and are free, there a set of actions that work with Adobe Photoshop.
http://www.thelightsrightstudio.com/TLRSharpeningToolkit.htm
Output sharpening, depends on your ouput medium, when printing I will use the sharpening in Qimage to the final sharpening and for the web I let smugmug do the final sharpening when they do the resizing.
Sounds complected but most pictures only take a few minutes of processing to get it all done including the sharpening.
Martin
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Vancouver Island, zone 8B
Nikon D70/D200 300 f4 af-s, 400 2.8 af-i
www.frogpondphotography.com
www.frogpondphotography.blogspot.com