Chough eye color

Hello birders,

Looking through our photos, I found one with interesting contrast between the birds’ eye colors.
See the second photo for Chough at this checklist:
Two birds there, I assume immatures, appear to have dark eyes.  The one facing the camera seems to have white eyes, not red.  Is that unusual?
I have read that Choughs’ eyes can engorge with blood during displays and interactions.  Perhaps this individual is exceptionally serene?
Thanks for any thoughts you may have —
good birding,

Steve Johnson
returned now to the United States, no longer seeing all those wonderful birds Down Under

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