To keep from continuously highjacking the picture a day thread, I figured for more in depth bird ID's, a dedicated thread should be started.
Ok, with that said, the first thing I will address is the gull ID situation heartyfisher and I spoke about. Those were shots of adults wings which are the easiest. There are four species show cased there. Here are the pics once again:
It's the easiest of this group. It's wing tips are not black but are about the same shade as the rest of the wing. This is unique among gulls.
The common large gull of the northern hemisphere. Black in the wing tips is usually limited to near the tips. The white spots in the wing tips are called mirrors. Most Herring Gulls show 1 or two large mirrors on the out two flight feathers. Note the gray invades the black area. This is typical of birds from the east coast of NA and in Europe but not so much so in California. That gray area invading is called a tongue. The little white area at the end of the tongue is called a moon. These are all things us gull people look for. Like I said before, gulls are highly variable. Here is a typical west coast Herring Gull:
The black is a bit more extensive as the tongues are shorter and there are no moons. Also, there is often one mirror on the outer flight feather only. This makes it look similar to the next species:
This species is smaller than the first two. It also has a black spot in addition to the red one on the lower part of the bill. It has dark eyes similar to Glaucous-Winged Gull but unlike the pale yellow of Herring Gull. It's gray on the back and wings (the mantel) is slightly darker. The black in the wing tips is more extensive than than even a west coast Herring Gull. There are always two mirrows on the outer two flight feathers and they are large.
Size of the first two species so larger than California Gull. It's a dark backed species so on the west coast of the US where it is found, it's identification is usually straight forward but there are rare occurrences of similar looking species. Black in the wing tips is the most extensive of this sample group. It normally has only one small mirror on the outer flight feather. Northern race (which this is), is slightly paler than the southern race which I've posted earlier in the PAD thread. Here's that one again:
Ok, I'm off my soap box now. LOL
Feel free to use this thread so we can keep the PAD thread on topic more.