I was in Waterworks Road, Hastings and I noticed this mural phenomenon.
The plant is a rather fine example of ivy-leaved toadflax (Cymbalaria muralis) but I thought the splash of white paint was also very striking, looking rather like the head of a slavering wolf.
It was only after I got home that I noticed the black bird in the position of the wolf's eye. Quite plainly this has been drawn here as it is not the same colour as the bricks (you can also see the 'wolf's head' on Google's Street View and the bird is not there).
I suspect it has something to do with the Hastings & Bexhill Wood Recycling Project which has a workshop a few yards up the road where they make, among other things, nest boxes and wooden seagulls. Or maybe it is a Banksy miniature: he has, after all, worked in the Hastings area.