Welcome... Interesting images. A few thoughts:
1. I really like this image. It's unusual in composition and execution, but very strong nonetheless. Everything works very well for me except the focus. I can't find one sharp spot on the image. I'm guessing this was due to the low shutter speed. As a rule of thumb, 1/60 is about as low as you should hand-hold a camera, and never hand-hold when your shutter speed doesn't exceed your focal length.
2. This one almost made it; unfortunately you have two issues here. One is a too-shallow depth of field, rendering the right forefoot and leg out of focus. As well the pose doesn't really work; animals are invariably best photographed at their eye-level, and with them looking toward, ('though not necessarily right into) the camera.
3. A nice composition with this one, and good overall exposure, BUT again, a couple of (IMO) issues. 1. The sticks in the left and right foreground are rather messy and distracting. 2. This image is screaming for the use of a polarizng filter; this would have increased the overall contrast and removed the over-bright reflections from the water. Good work on the use of the slow shutter speed to give the water a soft appearance, but in general, you need speeds of 1.5 - 3 seconds to get the really soft look.
Overall, some very nice images, with minor issues. Keep up the good work. Looking forward to seeing more.
Just my $00.02 worth - your mileage may vary.
~John