Hi JanJ, once again, we fully agree!
I did not care for the unmarked black primaries against a gray tertial on a Little Gull, not at all, but I guess if there is one month of their lives where that situation would be most likely to occur, it would be May of 2nd CY, albeit still not likely.
In total, I had five factors strongly favoring Med over Little, including:
1. White crown
2. Lightish head markings
3. Pale brown carpal bar
4. No visible red in legs
5. Pure black primaries
But as strongly as they favored Med over Little, still... on such an apparently small gull, in a bird transitioning from 1st winter to 1st summer when molt and wear variation could create all kinds of havoc, could we absolutely and definitively rule out Little on a long range photo from one odd angle? That's why I liked zooming in on the tertial pattern, because that #6 field mark was fine for Med but just
should not be there on a Little, and therefore in combination with 1-5, we
nailed the B******! whether he would fly or not! 3