In summer a robins' territory is defended by a mated pair, while each bird holds individual winter territories. Breeding territories average 0.55 ha in size - about six would fit onto an average-sized football pitch while winter territories are around half of this. The exact size depends on the quality of habitat and the density of birds in the area Read more at www.rspb.org.uk/birds-and-wildlife/wildlife-guides/bird-a...