What’s great about birding in Alaska is that you see species in their breeding plumages, like Harlequin Duck and Snow Bunting (4th and 5th photos).  Bald Eagles are everywhere, including younger birds (3rd photo; takes 4-5 years before an adult Bald Eagle is completely white on head and tail); first photo: Wood Sandpiper in Adak, probably just arrived there, some actually breed on the island; last photo: Eurasian or Common Teal, which in all likelihood will be split off from Green-winged Teal.  Can’t count it as new quite yet!