Very nice expression captured and good sharpness. Congratulations!

Quanto ao céu, esta talvez fosse uma foto onde a técnica HDR (High Dynamic Range) pudesse dar uma grande ajuda.

Está incrível o detalhe da flor!Nunca experimentei fazer uma macro tão perto de uma flor, mas resulta muito bem. Parabéns!

Did you use a circular polarizer filter? If not, I'm sure this would have benefited the image, by making the sky's blue deeper, and removing some reflection from the water.

Nice view.

Nice panning effect (I assume that's what you did). I've been experimenting with the technique myself, as you can see in http://www.treklens.com/members/pombeirp.
Maybe you could write a note explaining what you did.

Very nice subject, and nice pose. Unfortunately, it seems the camera focused the grass behind the bird, instead of the bird itself.

Excellent colors and sharpness. The look on the sparrow is really nice.