Wow, that photo of the Goosander with allll the chicks is amazing, what a brilliant sighting to have as your life list entry!
My most recent life-list addition is actually a bird I saw six years ago - I know, I know, I feel bad for ignoring the poor thing all this time! I'd taken the pictures of some little cute bird I didn't recognise, while walking to Foxton Locks from the car park, intending to look up what it was when I got home from my trip.
Then totally forgot - back then I hadn't started birding, just a fan of nature in general, so ID-ing everything wasn't a priority, hah
The other day I went to look back at my photos of the locks and canal boats, and there were these three shots of the bird in the tree I'd walked under. Of course, now I've spent a lot more time reading my bird books, I recognised it right away, and can say I saw my first (and only) Spotted Flycatcher back in the summer of 2018!