
sinensis? #1

#2
Is the angle of the bare skin too wide for sinensis?

#3
Surely this one is too big, with a particularly sturdy bill. But look at the perpendicular skin patch - in the field I thought I saw a much wider angle. Perhaps the pose in this photo is misleading?
Here are #1 and #2 together - from this picture number 2 looks like it has an angled gular patch more like carbo

sinensis #1 and #2
... and then there was this beauty !
