Metadata accompanying 'tidy_data\\pcb_eu28_adj_above5_zenodo.csv' 
Input dataset for paper: Abundance decline in the avifauna of the European Union reveals global similarities in biodiversity change

Column heading	Description
species:	species accepted latin name in HBW and BirdLife International (2019) Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world. Version 4. Available at: http://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v4_Dec19.zip [.xls zipped 1 MB].
species_code:	species code used by the PanEuropean Common Bird Monitoring Scheme
year:		year
index:		the time-series of index values for the species used in the models described in the paper
index_se:	the standard error of the index values available for the species
ln_index_se:	natural log of the index standard error, used to estimate the index confidence interval
lci:		lower 95% confidence interval around the associated index value
uci:		upper 95% confidence interval around the associated index value
firstyear:	the first year of data for the species used in the models described in the paper	
lastyear:	the last year of data for the species used in the models described in the paper
firstyear_orig:	the first year of data available for the species
index_orig:	the full time-series of index values available for the species 
species_orig:	the latin name for the species used by the PanEuropean Common Bird Monitoring Scheme