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And didn't we have lovely weather at Cawsand BioBlitz, which was a bonus given the Red Alert forecast!
(sorry wrong location)
ChrisMcA and I have noticed the stress marks IN the shell.
Do you have any comments Trudy?
See also my http://www.ispotnature.org/node/324530
Lat/Lng: 50.333, -4.1999
OS grid ref: SX435504