53. Black Scoter (Melanitta americana)

Black Scoter is very similar to Common Scoter, but look at that big yellow blob! That is your main difference, right there - in Common Scoter, the base of the bill where it joins the forehead is black (although there can be some variation in the size and spread of their yellow bill markings) but in Black Scoter, the bright yellow always extends right up to the forehead.

Black Scoter, ©Aaron Maizlish, via Flickr Creative Commons.

Black Scoter sketch.

Very pushed for time tonight so only a quick sketchy drawing, hopefully I'll have more time for tomorrow's drawing. I added some yellow to show I made at least some effort.