At this time of year, the morning flights of skeins of Canada geese from West Park get bigger and noisier. The birds set off as if on their long ancestral autumn migration from Canada to Mexico, before they remember how cushy their life is on the boating lake.
A few of these birds are smaller and paler than the others. They are crosses: one parent was a Canada, the other most likely a domesticated goose. The lead bird in the main picture is a greylag!