No problem then, I miss read your post.

Still, if you have to possibility of getting animals walking, you will need a camerra that will trigger before 4 seconds. Anything after that, and the animal will most likely walk through your detection window before the picture is taken.

Since you put a limited budget on youurself, I am surmizing that cost is a major factor in your needs. A 35 mm trail cam will probually give you the faster trigger time out there and best flash, but it will have large limitations. Usually, unless you use a 36 pic roll, you are limited to 24 pics befroe it is full. The cost of developing can become expensive, as well as you will have to pay for false pictures (pictures with no animals, triggered by nature). With the digitals, you can have setups that take more then 200-300 pictures in one setup or even set up for movies. You can also view the pictures right in the field (with trail cm, another cam, or with a digital viewer). Then transfer the pics to a Disk or even print the ones you want for a hard copy version.

Hope this helps.