dejayM's picture

Periwinkle shells

Observed: 27th April 2013 By: dejayM
Biological Recording In ScotlandHighland Biological Recording GroupOrkney Biodiversity Records Centre
dejayM’s reputation in InvertebratesdejayM’s reputation in InvertebratesdejayM’s reputation in InvertebratesdejayM’s reputation in Invertebrates
variation
banding
scale
Description:

Empty shells; often grey looking in rock pools but in the warm light of home, gorgeous tones.
This post though is to show the huge variation in pattern. Scapa Flow winkles.
EDIT - added a scale picture. See http://www.ispotnature.org/node/776625 (comments)

Identifications
Species interactions

No interactions present.

Comments

nightfly's picture

Lovely examples Derek. Those

Lovely examples Derek. Those lines are very clear to see. I also wonder how that is caused- I have no idea.

Cathal.

ChrisMcA's picture

Fabulous examples dejay;I've

Fabulous examples dejay;I've never seen the like.My ex. is at http://www.ispot.org.uk/node/306268 , & I thought they served as "cryptic camouflage", ie breaking up the winkle's outline to a passing bird (especially in moving water); but bobthebirder said "Some of the 'colouration' is due to wear, the dark outer layers of the shell being worn away revealing the white lower layers." which makes no sense to me.