Introduced in version 1.1.2. List of species and comments returned as warning messages if the time-span of an analysis is not appropriate: A collection of species and species-complexes where observations are not consistently recorded through time. List intended to help flag particular species where some trend analyses may be inappropriate.
Format
species_notes
A data frame with 6 rows and 5 columns
english- The English name of the speciesfrench- Le nom francais, de l'especeaou- The unique numerical identification of the species in the BBS databaseminimum_year- The suggested first year by which the species observations are consistentwarning- The text warning and explanation delivered by the prepare_data function
Examples
species_notes
#> english french aou minimum_year
#> 1 Alder Flycatcher Moucherolle des aulnes 4661 1978
#> 2 Willow Flycatcher Moucherolle des saules 4660 1978
#> 3 Clark's Grebe Grèbe à face blanche 11 1990
#> 4 Western Grebe Grèbe élégant 10 1990
#> 5 Eurasian Collared-Dove Tourterelle turque 22860 1990
#> 6 Cave Swallow Hirondelle à front brun 6121 1985
#> warning
#> 1 Alder and Willow Flycatcher were considered a single species until 1973. It is likely that they are not accurately separated by BBS observers until at least some years after that split.
#> 2 Alder and Willow Flycatcher were considered a single species until 1973. It is likely that they are not accurately separated by BBS observers until at least some years after that split.
#> 3 Clark's and Western Grebe were considered a single species until 1985. It is likely that they are not accurately separated by BBS observers until at least some years after that split.
#> 4 Clark's and Western Grebe were considered a single species until 1985. It is likely that they are not accurately separated by BBS observers until at least some years after that split.
#> 5 Eurasian Collared Dove was introduced into North America in the 1980s. 1990 is the first year that the species was observed on at least 3 BBS routes.
#> 6 Cave Swallows were relatively rare in the areas surveyed by BBS before 1980. There are only two observations during BBS before 1980.