Look at the Sony Handycams. My wife bought me one recently and it is trail friendly, light weight and will function as a still camera or with the included software you can do frame grabs as jpegs. It also has a feature they call tele-macro that I have been experimenting with, that I really like. They make three versions, HDR-CX 130 is the one she gifted me, but they make two "better" ones a Cx160 and a CX 180. Read "better" as more expensive. The video out of the 130 is quite good, so I am not sure how fantastic the two better ones really are. I am quite pleased with the 130 and look forward to my next trip to the Shawnee National Forest.
The 130 model doesn't have a connection for external mike, so maybe the two higher models offer that feature.