There has been some concern about posting photos full size and the site running out of space. Some people have stopped posting pictures as they find it difficult to resize, (myself included).
There is lots of room for expansion or another option is archiving.
Please feel free to post any size picture, especially if it's something you want help to identify.
If it's not the best quality and you want to delete it after you've made your ID that's fine too, but don't not post something because you think it's too big.