The Scottish Executive does nothold this information centrally but is aware of the following;Red-Breasted MergansersThe most recent estimate of numbersof breeding red-breasted mergansers are:561 males (299 to 915, 95% ConfidenceLimits)591 redheads (females and immatures)(262-1,019, 95% Confidence Limits).These estimates are based oncounts made in 1987 and 1997 prior to the main breeding period, and are regardedas minimum estimates.Data from the Wetland Bird Surveyindicate that mergansers are widespread throughout Scotland, andthat there has been virtually no change overall in the size of the population atkey census sites...