Identifying mallard x pacific black duck hybrids - eBird
Article on eBird with tips on identifying hybrids from pure PBDs, with photo comparisons: https://ebird.org/australia/news/identifying-mallard-x-pacific-black-duck-hybrids
Article on eBird with tips on identifying hybrids from pure PBDs, with photo comparisons: https://ebird.org/australia/news/identifying-mallard-x-pacific-black-duck-hybrids