This is in natural light w/ out the blue adding of the flash and lens which in some lights adds the blue cast, to grays whites and hard blacks. you must understand photography to understand this happens and its affects on the color of those colors I just mentioned. So saying that, you can see the tail is black, I also read recently grey greens can have deep blue/blackish tails so even if he did have that, he could still be grey green, also if she had violot mixed in that could account for any tail color, but again, these pictures show the true shade of her tail which is black.
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