In reply to ripper:
Near my work, there's a stretch of the Irwell in Salford that has loads of Goosanders on it. But not seen many goosanderlings (I have unilaterally decided that this is the correct word 😁). One brood of 4 now seems to be 3 ☹️ and there's another female with just 1.
Loads of male and female without any young, but fascinating to watch them swimming underwater.
Although the Irwell can look pretty naff at times because of the amount of rubbish that gets swept down, it must be reasonably clean to support all these Goosanders.
Similarly, there are loads of Canada Geese but only 3 sets of goslings (1 + 2 + 6). Not sure how last week's 2 + 4 has morphed into that unless the 4 has become 2 and the 2 has become 1.
Not sure if the single Greylag hanging out with the Canadas realises it's on its own yet.