Bar-headed Goose
Anser indicus
The bird is pale grey and is easily distinguished from any of the other grey geese of the genus Anser by the black bars on its otherwise white head. It is also much paler than the other geese in this genus. In flight, its call is a typical goose honking. A mid-sized goose, it measures 71–76 cm (28–30 in) in total length and weighs 1.87–3.2 kg (4.1–7.1 lb).
ID text from Wikipedia, CC BY-SA 4.0
Emperor Goose
Anser canagicus
The emperor goose has a stout blue-gray body, with spots of black and white, which cause it to have a "scaled appearance". Its head and the back of its neck are white and tinged with amber-yellow; unlike the snow goose, the white does not extend to the front of the neck. The goose is also characterized by a black chin and throat, a white tail, a pink bill, which is tipped with white, and yellow-orange legs and feet. The underside of the emperor goose's wings is gray, unlike the snow goose, which has black and white on the underside of its wings. Voice: Its vocalizations, according to Edward William Nelson, sound like "kla-ha, kla-ha, kla-ha", and can be differentiated from those of other geese by having a more "nasal" sound. It vocalizes less often than other geese, such as the white-fronted goose.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Bar-headed Goose and Emperor Goose.