
There a nice image here..
You got the eye with a catch light in it that the light spot in the eye..
The colour in the feather look a like bit on the bright side this may be dew to the bright sun light...
Please leave a little room in front of the duck so it leaves the mind that it got room to move in to...
It looks like you got a nice nikon D7000 and a nice VR lens...
I would set camera to A for Apture and learn about depth of feild (DOF) A low F like 2.8 will blur very quickly outside focal area so it not sharp..
A high F like F22 You find it very sharp from front to back of image..
If it a bright day shutter will go quick a dull day shutter will stay open longer...
The key is finding right shutter speed and right F stop of the image...
Do not over do the colours on birds or animals..
but you might need to boost them in some images if a little dark...
I can go on....
Just take your time and understand your camera and you get better very quickly...
Dave