years ago Morris (1870) in the second edition of his History of British Birds remarked of the Marsh-Tit (Parus palustris) that " the male is believed to choose a partner for life," though unfortunately the species was not then distinguished from the Willow-Tit (P. atricapillus). Steinfatt (1938) observed that the Continental subspecies paired for life. Observations on the Marsh-Tit made from 1937 to...

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