The mean density of nests within areas identified as ‘nesting’ was estimated for each sub-area randomly using two 10 × 10 m survey plots within such areas (80 × 90 m) since the focus was not on individual trees.
The mean density of nests within areas identified as ‘nesting’ was estimated for each sub-area randomlyusing two 10 × 10 m survey plots within such areas (80 × 90 m) since the focus was not on individual trees.