Lesser Spotted Woodpecker sample survey in England 2007

Quality Control

These data have been gathered by trained field-workers and the data are of a high quality

These data have been mapped and checked for sensitivities and typographical/geographical errors

Method steps

1. See paper for detailed methods
   
   Woods were visited during daylight hours between 1st March and 20th April, avoiding days with heavy rain and strong wind. Woods were surveyed by selecting a transect route which covered as of the wood as possible. Survey duration was scaled to the size of the block of wood as follows:
   
   less than 30 ha 3 hours, 30-50ha 4 hours, 50-70ha 5 hours and 70+ha 6 hours
   
   Once a bird had been observed in a wood (by sight ,calling or drumming), the site was classified as 'occupied'. Woods were re-surveyed until a bird was located or until the survey period ended, whichever was sooner.

Broad-leaved woods in the New Forest, Yorkshire and Worcestershire