NZGBS 2018 | trend analysis methods

This report summarises the data editing, analysis and interpretation protocols for State of NZ Garden Birds 2018 - Te Ahua o nga Manu o te Kari i Aotearoa, which are as follows: - editing the raw bird count data ready for analysis - calculating changes in bird counts over the last 10-year and 5-year periods for a subset of widespread garden birds at national, regional and local scales - using a standardised set of criteria to help the user interpret the results and readily identify changes of potential concern or interest.