Capture Data and SNP Genotypes to Evaluate Subspecies Range Boundaries of the Bell’s vireo (Vireo bellii pusillus and V. b. arizonae) (2010-2022)

Genetic samples in the form of a small blood sample were collected from 263 Bell's vireos (Vireo bellii) in drainages throughout southern and central California, Arizona, southern Nevada, and southwestern Utah. We used population genomic techniques to delineate the range limit between the Least Bell's Vireo (V. b. pusillus) and its conspecific geographical neighbor, the Arizona Bell's Vireo (V. b. arizonae). This study provides a taxonomic classification of individuals sampled where the two subspecies meet. Moreover, it allows an estimate of genetic diversity and trends in both taxa, estimates sources and levels of dispersal and gene flow among drainages, and allows us to assess progress of recovery and effectiveness of actions across different population units. This dataset presents location, age, sex, and morphometric data gathered for the vireos from which we collected genetic samples.

We also include a genomic dataset from 317 individuals comprised of both the Least Bell's Vireo and Arizona Bell's Vireo collected in southern California, Arizona, Neveda, and Utah (USA). The genotypes for all samples are provided in a VCF file with 10,571 independent single nucleotide polymorphism (SNP) variants for population genetic analyses with 2.9 percent missing data overall. A companion CSV file is provided with sample names and occurrence designations.