Unsolicited Critique? If you post it, it is assumed you want critique... unless you post in "Just for Fun" which is a C&C free zone, more or less.
I more or less agree with WesternGuy...
#1 is the best... love the "look" the gull top right is giving the gull next to him...
#2 shows some decent feather detail.. no eyes... not much interest... non-photographers (facebook, etc) would love it, but they know little about photography.
#3 The ship is part of the "Story"? Then why did you use such a large aperture as to blur the ship so badly you can hardly make out what it is, except through context? I would have either kept it sharper.. or cropped it out!
#4 could have been nice, except for the cropped wing, with that... not really a keeper IMO!... "composition was hurried due to his close proximity" at 300mm... with your 70-300 (listed in your profile Nikon D80; Sigma 150; Nikon 18-70, 70-300VR, 50/1.8; Gitzo GT2540; RRS BH-40) no doubt? Zooming out was not an option? That is what zooms are for!