Elephant Hawkmoth

"The imago (adult) feeds at night, and often takes nectar from garden plants like Honeysuckles (Lonicera) and petunias, so it is quite often seen in urban settings in the evening. The moth typically has a wing span of 50–70 mm (2.0–2.8 in). It is spectacularly coloured, seeming to shimmer with green and red when in motion. The adult moths are eaten by some species of bats."
http://en.wikipedia.org/wiki/Deilephila_elpenor