Bullock's Oriole: more close ups

I was very surprised to see the gleam in this bird's eye which is shown so well in the top pic. So commonly this is the result of photographer's using flash, something I rarely use and did not use in these pics. This is all natural, likely from the sunlight, no artificial gleam in the eye.

I mentioned in the previous post that this bird was part of the landbird migration along the river corridor. So how do I know it's a migrant and not a bird that was here this summer? There were few Bullock's Orioles in this area this summer and those in the closest nests (1/4 mile away) had already moved on weeks ago.

In all the pics this bird has it's bill open--it was pretty hot and this is how birds cool off. SeEtta