(anser albifrons flavirostris)
There are two sub species of (Greater) White-fronted Geese, the European (anser albifrons albifrons) and the Greenland (anser albifrons flavirostris). See https://pbase.com/ianfulton/eurowfgoose for photos of the European ssp.
The European ssp breeds in the far north east tundra and winters in W,C and SE Europe including England whilst the Greenland ssp winters in Ireland and Scotland. Some of the birds photographed here are part of the flock of Greenland White-fronted Geese that has wintered for many years around the mouth of the River Endrick where it flows into Loch Lomond between Gartocharn and Balmaha. This area is part of the Loch Lomond National Nature Reserve. The principle winter location for the Greenland White-fonts in Scotland is on the island of Islay where up to 50% of the entire world population can be found.