ABSTRACT The population trends of Marsh Parus palustris and Willow Tits
P. montanus in the UK are examined using data from ringing totals, from 1956 to 2001 inclusive.These data may represent the best long-term information available on trends in numbers.When corrected for differences in ringing effort, the figures show that Marsh Tits declined sharply after the mid 1960s, although the population ...

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