Nose-leaf
A nose-leaf, or leaf nose, is an often large, lance-shaped nose, found in bats of the Phyllostomidae, Hipposideridae, and Rhinolophidae families. Because these bats echolocate nasally, this nose-leaf is thought to serve a role in modifying and directing the echolocation call.{{cite book|editor= Macdonald, D.|year= 1984|title= The Encyclopedia of Mammals|publisher= Facts on File|location= New York|pages= [https://archive.org/details/encyclopediaofma00mals_0/page/805 805]|isbn= 0-87196-871-1|url-access= registration|url= https://archive.org/details/encyclopediaofma00mals_0/page/805}}{{cite journal |last=Wetterer |first=Andrea L. |year=2000 |title=Phylogeny of Phyllostomid Bats (Mammalia: Chiroptera): Data from Diverse Morphological Systems, Sex Chromosomes, and Restriction Sites |journal=Bulletin of the American Museum of Natural History |volume=248 |issue=1 |pages=1–200 |doi=10.1206/0003-0090(2000)248<0001:POPBMC>2.0.CO;2 |display-authors=etal|hdl=2246/1595 |url=https://zenodo.org/record/5350042 |hdl-access=free }}
The shape of the nose-leaf can be important for identifying and classifying bats.{{cite web | url = http://animaldiversity.org/collections/mammal_anatomy/noseleaves/ | title = Noseleaves |author=Myers, Espinosa |author2=Parr, Jones |author3=Hammond, Dewey | date = 2016 |website=Animal Diversity | access-date = 2 May 2016}} Furthermore, the shape of the nose-leaf can identify behavior of the bat itself; for example, in the families that have the nose-leaf, experiments have shown it to act as a baffle and focus their emission beams.{{Cite journal|last1=Vanderelst|first1=Dieter|last2=Lee|first2=Ya-fu|last3=Geipel|first3=Inga|last4=Kalko|first4=Elisabeth|last5=Peremans|first5=Herbert|date=2013|title=The noseleaf of Rhinolophus formosae focuses the Frequency Modulated (FM) component of the calls|journal=Frontiers in Physiology|volume=4|page=191|language=English|doi=10.3389/fphys.2013.00191|pmid=23882226|issn=1664-042X|pmc=3715718|doi-access=free}}