jizz

1. (ornithology, birdwatching) The physical and behavioural characteristics of a bird that enable it to be immediately recognised by an experienced birder as a certain type of bird, especially to family or genus level.Examples: "A West Coast Irishman was familiar with the wild creatures which dwelt on or visited his rocks and shores; at a glance he could name them, usually correctly, but if asked how he knew them would reply ‘By their "jizz".’"; "Political cartoonists rely a lot on jizz. When a new president or prime minister comes into office it usually takes the cartoonists a little while to decide which features to select as field marks but they then stylise these in ways that make them instantly recognisable to the rest of us, even though they may be grossly exaggerated."; "His birds are not carefully posed to illustrate every plumage detail; they are impressions rather than portraits. With a few deft strokes of his pencil, he captures their 'jizz'."uncountableusually