Even after nearly a whole day trying to identify it correctly, I still could not figure out what species it was so I asked Charlie Fletcher. He informed me it was a Brown Rustic (Rusina ferruginea). The name Rusina means ‘reddish’ and ferruginea also means ‘reddish’ or ‘the colour of iron-rust’.
The larvae of the Brown Rustic feed on herbaceous plants such as dock (Rumex).
The Brown Rustic, despite its slightly insignificant appearance, is actually listed as uncommon and is new to Shandy Hall which makes it species number 415!
Post : Walter Chen [UPenn intern]