Great picture. You make some of the best HDR photos I've seen. I'm a little on the fence with the crow. It adds a kind of comical (not really the word I want, but closest I can think of) creepiness, but with out it it adds a slight more realism to it.
Also, what do you mean by merging the B&W with the colour version. Do you mean having them in separate layers, and increasing the opacity on one? Sorry if this is a dumb question, I'm pretty new to Photoshop