Percent change in counts for 14 garden bird counts for the past 10 years (2011-21) and 5 years (2016-21) at four spatial scales: national, regional (R), territorial authority (T) and urban-rural (U) area as defined by Statistics NZ 2018 spatial layers. Median and 80% confidence intervals (10% and 90% quantiles) are provided, along with the trend size and strength of evidence categories (see NZGBS 2021 trend analysis methods report for categorisation criteria).
Citation: Hayman E, Brandt AJ, MacLeod CJ, Howard S, Gormley AM, Spurr EB. 2021. State of NZ Garden Birds 2021 | Te Ahua o nga Manu o te Kari i Aotearoa. Manaaki Whenua - Landcare Research, Lincoln. ISSN 2744-5267.