Band of brothers

I thought this was an interesting photo. At the back is the adult Caspian Gull from the other night, in the middle an adult Yellow-legged Gull, and at the back an adult Lesser Black-backed Gull.

All have red (or almost red) orbital rings, with the Yellow-leg having the largest eye of the three, and the Caspian the darkest.

The bills range from very bright in the Yellow-leg to fairly dull in the Lesser Black-back, with the Caspian in the middle.

P10 is also visible on all three, with the Caspian's being the longest and whitest tipped, the Lesser Black-back being in the middle, and the Yellow-legged having the smallest amount of white.

Fascinating.