Adders:  FAIL
Either we are the worst adder-locators in the world or they are all DEAD.  Have been out twice now and searched all the sunny banks and under old bits of corrugated iron and have found not 1 Adder.  We did find 2 Grass Snakes and 4 Slow Worms though.  Observe:

A Worm Head



Shortly after this photo was taken I got to hold the Slow Worm and it promptly released its bowel contents all over me. 

Reptile searching does have its upsides though.  This morning as we left the visitor centre we saw this beautiful Barn Owl hunting over the fen.

In fact our (wholly unsubstantiated but interesting) theory is that the mysterious absence of Adders is due entirely to the hunting pressure of the Barn Owl species on the reserve.

Now that they have run out of Adders I suspect they will return to their more traditional food sources.  Like this fat juicy little vole.