https://www.oulu.fi/en/theses/ecology-and-conservation-lesser-white-fronted-goose-anser-erythropus
Ecology and conservation of the Lesser White-fronted Goose Anser erythropus | University of Oulu
lesser white fronted gooseecology and conservation
https://www.animaldiversity.org/accounts/Anser_erythropus/classification/
Anser erythropus (lesser white-fronted goose) | CLASSIFICATION | Animal Diversity Web
lesser white fronted gooseanser erythropusclassificationanimaldiversity
https://www.rspb.org.uk/birds-and-wildlife/white-fronted-goose/
White Fronted Goose Facts | Anser Albifrons
The white fronted goose is a grey goose, bigger than a mallard and smaller than a mute swan. Adults have a large white patch at the front of the head. Read more
white fronted goosefactsanseralbifrons