The Jersey Emerald (Pseudoterpna coronillaria) is a species of moth in the Geometridae family.
Although not recorded on mainland Britain, this species can be found on Jersey, where, until 2001, it was classed as a form of Grass Emerald. This species is very similar to the Grass Emerald, but is generally greyer, sometimes with a hint of green on the wings. Like the Grass Emerald this species has two dark central crosslines, and a pale outher crossline.
When the Jersey Emerald is active