I fished this out of the birdbath today and thought it dead but it did come back to life once it warmed up
Length 13 to18 mm. A very large and unmistakeable greeny-grey leafhopper with ear-like projections on the pronotum. This species can stridulate quite loudly.
It is found on lichen-covered trees, particularly oaks.
When to see it
Adult: May-September, but rarely seen due to its excellent camouflage.
Found locally across southern Britain…. Naturespot
The photo below is showing what it should look like
(not my photo)