Pelican at sunset

Interesting shot. To me, there is an overall green cast to the image. I downloaded your image and made a color adjustment and it seems to help IMHO. Also, for a silhouette, I would have liked better definition of the bill.

While this is interesting light, I find the composition too centered and creates a static feel. I'd look at different crops to move the pelican somewhere else in the frame. Agree with Jerry about an overall green cast.

I like the rim lighting on the Pelican, Enrique. Unfortunately, all the highlights in the water draw my attention away from it, though they're kind of neat on their own.