| hybridization and back-crossing in giant petrels (macronectes giganteus and m. halli) at bird island, south georgia, and a summary of hybridization in seabirds. | hybridization in natural populations provides an opportunity to study the evolutionary processes that shape divergence and genetic isolation of species. the emergence of pre-mating barriers is often the precursor to complete reproductive isolation. however, in recently diverged species, pre-mating barriers may be incomplete, leading to hybridization between seemingly distinct taxa. here we report results of a long-term study at bird island, south georgia, of the extent of hybridization, mate fid ... | 2015 | 25815478 |