When I started birding, Crows with bread in their bills were always Rooks

So the local playing fields in NW London (where Rooks are rare), suddenly became inundated by 'rook' sightings until I straightened myself out.
At Brent Res in London I was sat with an old birding pal in the hide a good few years ago when he suddenly said 'bloody hell...white heron over those reeds!'. Little Egret had never been recorded there before despite it being a very well watched location, so we assumed it was one (neither of us were beginners, it was just that once we decided a white heron there must be Little Egret it was properly cemented in our, now closed off, brains

). It flew around for ages, did a circuit of the reservoir, landed briefly on the bank in the open, next to a Grey Heron, then flew again directly over our heads and towards the smaller North Marsh. I was dead happy and let Max wait in the hide while I legged it to phone out the site's first Little Egret. Later I got a call from Andrew Self to say he'd relocated it in flight, noted it was bloody big with a yellow bill and black feet etc etc... I embarrassingly recalled at this point that it had stood tall over the Grey Heron it had landed next to at one point and realised I'd nearly cocked up London's first ever Great White Egret....
Also with herons, when a young lad and birding with my Dad I once swore blind to him that there were about 20 Grey Herons walking in a long line through the long grass near the reservoir... turned out to be the tops of masts on the sailing boats..
Wont even go to Ring-billed Gulls..'saw' a few of them when in my mid-teens before I knew what a proper one looked like too
Suppose everyone makes cock-ups in their early days
Jan