What is another word for alula?
Pronunciation: [ɐljˈʊla] (IPA) 
Alula, also known as the bastard wing, is a small feather that helps birds to control their flight. While this term may be unfamiliar to many, there are several synonyms that can be used to describe it. One such synonym is the "spurious wing," which is another term that is used to refer to the same feather. Another synonym is the "thumb feather," which refers to its placement on the wing. The alula can also be referred to as the "small winglet," "bastard winglet," or the "propatagium." While the word alula may not be common, the use of its synonyms can help to provide clarity in describing this unique feature of bird anatomy.
