by nature Mute Swans (Cygnus olor) are aggressive birds, even in the breeding season they are found together, and are, according to The Handbook, "outside breeding season sociable and often seen in parties." Some (usually) fortnightly notes on the territory of a pair of Mute Swans over a period of three-and-a-half months--from mid-October to mid-February during the winter 1944-1945--may therefore b...

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