Green anoles display their dewlaps for breeding and to establish territory among males. When a male anole enters the territory of another, the holder of that territory displays his dewlap and bobs his head up and down. Often the intruding male will leave, but he might also return the display and try to take that territory. Such encounters can turn violent.
Male anoles will also display their dewlaps when their territory is breached by people, dogs, chickens and the like. In this photo, the male anole is displaying his colors at me, but with an air of resignation. I think this is because he recognized me and knew that I was mostly harmless and, no matter what he did, I wouldn’t go away until I’d taken a few photos.
Graham's Island 
He is beautiful and he does seem to express an air of tolerant resignation.
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Indeed, as opposed to geckos, which tend to have a goofy grin as though they’ve just been caught doing something mildly naughty.
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☺
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Hahah, you wore him out!
What a beautiful green photo, and creature.
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I really like anoles. They have a reptilian look and a certain gravitas. When a male has established his territory, he does get used to human encounters and seems to tolerate it, albeit with a certain resignation.
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