Perhaps the one on the left said:

'Has he noticed us? We're blending in right!?'

the one on the right:

'I think he's noticed us...he's looking straight at us...'

with the one on the left saying

'Keep still! He might not have seen us!'

or perhaps not... I left them too it anyway :-)

on a morning here which was foggy in places, and frosty (as can be seen in the extras), but with the sunshine coming through in places.