When Steve emailed me I decided to take a test shot to demonstrate lens focal length-magnification. So here is a shot of a crow decoy I shot in my back yard at 20 yards yesterday. I used 2.5moa of elevation and 2 minutes of left windage. [img]/ubbthreads/images/graemlins/smile.gif[/img]
In discussions of lens focal length and magnification, the convention is to talk in terms of 35mm film camera lens equivalence. So even though I used a 200-400mm zoom lens set at 400mm...we would call this a 600mm equivalent lens because my camera has a 1.5X factor built in. When you shop for a camera and lens combo you need to do some extrapolation to figure your own magnification needs based on subject size and distance.
Here is a link to a website that has excellent reviews of many digital cameras. There you can read all the important specs. Digital Photography Review
This is a review of Mach V's Sony camera. It's 12X zoom lens tops out at a 432mm equivalent focal length. Here is a review of the Canon XT-i
With this one you would need to add a longer lens. This camera would be an excellent start of a system that could grow with your interest and budget. I would consider buying a good telephoto used on Ebay when you can afford it.
Next photo, since you mentioned Teal, is a Blue Winged Teal I shot from a blind at 25 to 30 yards with a 600mm plus a 1.4X converter. Total focal length equivalence was about 1,260mm.