A Christmas favourite may be in danger without our help as cold weather can prove to be tricky for robins. With the first snow of the season having already fallen one expert has offered up help and insight as to why robins need our help – and just what we can do. A robin can use up to 10 per cent of its body weight to keep warm on a single winter night, so unless it can replenish its reserves every day, a cold spell can prove fatal. This is particularly hard for them because daylight foraging is reduced to just eight hours or less, compared to over 16 hours during the summer. British Trust for…