#16 "jizz (uncountable) (ornithology) The unique characteristics of a bird species that enable it to be immediately identified by an experienced birdwatcher who has seen that bird before and is familiar with its appearance and behaviour."
#16 "jizz (uncountable) (ornithology) The unique characteristics of a bird species that enable it to be immediately identified by an experienced birdwatcher who has seen that bird before and is familiar with its appearance and behaviour."
(ornithology) The unique characteristics of a bird species that enable it to be immediately identified by an experienced birdwatcher who has seen that bird before and is familiar with its appearance and behaviour."
Source: http://www.wiktionary.org