Reading the thread about the Herts Gray-cheeked Thrush, it occured to me that I'd forgotten most of the ID features for Bicknell's Thrush, so I read it up and posted the results. Trouble is, I'll I know have forgotten it all again within a couple of weeks. It's OK with the species you see every day: you can take notes, study the birds and keep your eye in. But how do you remember all the minutiae of the finer ID points for species you don't see regularly (if ever)? Are you one of those lucky people who can just mop up information like blotting paper, or do you have to work at it? And if the latter, have you got any tips to help make the information stick?