Thanks for the replies.

I have seen reports of albinos in some of my books but with no pictures to back it up.

The only morph(?) I have seen of these is a specimen I just turned up. It is gray-olive in the center stripe and a bit to the brown in the head but the body is all grey with black and white markings and the venter is solid grey.

Is this unusual? I have only seen the brown (normals) before.

Frank
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"The luxury of not getting involved departed with the last lifeboat Skipper..."