The Calvin Shrimp is an orange/red variant of the Park Shrimp- its simply a change of colour scheme, but the fly retains the movement and profile of the 'Parky'.
And it has been fishing well. I have had about a dozen fish on it and a few friends have likewise.
Check out Newtyle Ghillie Martin Ritchie's blog for some great footage of the Calvin swimming in the Tay. Backed up of course by a fish in Martin's net soon after.
