Editing Shrew (section)

===Echolocation===
[[File:NShortTailedShrew23.jpg|thumb|right|The [[northern short-tailed shrew]] is known to [[Animal echolocation|echolocate]].]]
The only terrestrial mammals known to [[Animal echolocation|echolocate]] are two genera (''[[Sorex]]'' and ''[[Blarina]]'') of shrews, the [[tenrec]]s of [[Madagascar]], [[bat]]s, and the [[solenodon]]s.<ref>{{Cite web |title=What is echolocation and which animals use it? |url=https://www.discoverwildlife.com/animal-facts/what-is-echolocation/ |access-date=2022-03-25 |website=Discover Wildlife |language=en}}</ref> These include the [[Common Shrew|Eurasian or common shrew]] (''Sorex araneus'') and the American [[vagrant shrew]] (''Sorex vagrans'') and [[northern short-tailed shrew]] (''Blarina brevicauda''). These shrews emit series of ultrasonic squeaks.<ref>{{cite journal |jstor=1380190 |pages=751–9 | vauthors = Tomasi TE |title=Echolocation by the Short-Tailed Shrew Blarina brevicauda |volume=60 |issue=4 |journal=Journal of Mammalogy |year=1979 |doi=10.2307/1380190}}</ref><ref name="Siemers">{{cite journal | vauthors = Siemers BM, Schauermann G, Turni H, von Merten S | title = Why do shrews twitter? Communication or simple echo-based orientation | journal = Biology Letters | volume = 5 | issue = 5 | pages = 593–6 | date = October 2009 | pmid = 19535367 | pmc = 2781971 | doi = 10.1098/rsbl.2009.0378 }}</ref> By nature the shrew sounds, unlike those of bats, are low-amplitude, broadband, multiharmonic, and frequency modulated.<ref name="Siemers"/> They contain no "echolocation clicks" with [[reverberation]]s and would seem to be used for simple, close-range spatial orientation. In contrast to bats, shrews use echolocation only to investigate their habitats rather than additionally to pinpoint food.<ref name="Siemers"/> <blockquote>
Except for large and thus strongly reflecting objects, such as a big stone or tree trunk, they probably are not able to disentangle echo scenes, but rather derive information on habitat type from the overall call reverberations. This might be comparable to human hearing whether one calls into a beech forest or into a reverberant wine cellar.<ref name="Siemers"/>
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