That's really sad. I'd heard about trich, but I had no idea it manifested like that - I'm lucky in that I've never seen a bird with it, as far as I know.
I live just outside Cambridge, but I have several bird feeders and a bird bath in our tiny front garden (where I can see them from the kitchen window), and I never cease to be amazed at the variety of life we get, even here. At the feeders and on the ground, I've seen blue tits, pied wagtails, blackbirds, starlings, collar doves, wood pigeons, crows, sparrows, dunnocks, robins and magpies; we also had some goldfinches feeding on the lavender once. We also noticed a small hedgehog one autumn, obviously a bit too little to survive winter on its own; sadly, our local wildlife rescue centre closed down a couple of years ago, and I couldn't have him indoors - there are five of us in a tiny terraced house, along with three dogs, four ferrets, thirteen snakes (!) and numerous fish! So I got a guinea pig house, and Mr D modified the door so it was just the right size for a small 'hog, but too small for a cat, and I stuffed the bedroom with straw and put fresh water and meaty cat food in every day through the winter. The food was almost always gone, and there was plenty of 'hog poop around, and when I cleaned it out in the spring there was a nice 'hog-shaped hole in the middle of the straw. I think he made it - I do hope so.
I also go ferreting with Mr D at weekends through the winter, and it's amazing what you see when you get your eye in - apart from rabbits, obviously!! We've seen deer (red, roe and muntjak), various birds of prey, and quite a few foxes; we've also seen hares, which are great to watch in the mating season - hence the saying "mad March hares"!
This is a great thread, by the way.