Distribution Maps
These maps show all of the tetrads in which Mallard was recorded and the maximum number of individuals recorded in each tetrad (abundance).
These maps show the tetrads in which Mallard was recorded in Summer and Winter respectively.
Summary statistics
| Statistic | Breeding season | Winter | Total |
|---|---|---|---|
| No. of tetrads | 132 | 130 | 159 |
| No. of visits | 220 | 226 | 446 |
| Highest count | 67 | 150 |
Changes from the Bird Atlas 2007-11
Simple catchment maps showing change in distribution from the Bird Atlas 2007-11:
- -1 (species lost to the Tetrad), recorded in 2007-11 but not in 2016-20 data
- 0 (species remains in the Tetrad), recorded in both 2007-11 and 2016-20 data
- +1 (species gained in the Tetrad), recorded in 2016-20 but not in 2007-11 data
Map data (c) OpenStreetMap contributors, (c) Environment Agency