Overwintering and Resident Birds in Qatar: Explorations With DNA Barcoding

Genetic research is unevenly distributed across the globe, with most research done in temperate zones. To better understand the birdlife in an under-represented, arid subtropical country, Qatar, we blood sampled birds and salvaged tissue from dead birds, then sequenced a mitochondrial marker (cytochrome c oxidase subunit I, COI, the "DNA barcoding" gene). We chose the DNA barcoding gene because it has previously proven useful for preliminary explorations of evolutionary history. We obtained DNA barcodes for 115 birds (34 species, 12 orders). Our data suggest that the existing DNA barcode reference library, built largely from sampling in the Americas, Europe, and east Asia, is generally sufficient for species identification in Qatar. Based on DNA barcode similarity, Qatar provides overwintering habitat to some species with apparent strong migratory connectivity and others with weaker migratory connectivity. Among locally breeding species, we found no evidence of hybridization between House Sparrows Passer domesticus (n = 16 males) and Spanish Sparrows P. hispaniolensis (n = 14 males), breeding simultaneously and in the same habitats, although in other locations of range overlap, habitat segregation and timing of breeding are hypothesized to be the primary reproductive barrier between them. Our results highlight the benefits of expanding the geographic range of genetic and ecological research.