Greyness to the power of grey

It was a very grey day today and it was hard to find an interesting image, but in the end this photo of blacks and greys sums up the day rather well.
These crows (or are they ravens) live here the whole year round. I’m not sure what they eat once the snow and the big freeze arrives but they can be seen every morning flying towards the rubbish tip, and away from there as the sun goes down.
(It is actually a colour photo, but you wouldn't know it!)