In https://www.inaturalist.org/journal/milewski/55532-previously-overlooked-facial-expressions-in-the-wapiti#, I showed that a typical species of cervine deer possesses auricular semets, particularly in juveniles and adult females in summer coat.
This finding is all the more intriguing because, in other respects, the sexes hardly differ in colouration in the wapiti (Cervus canadensis).
Since we now have a search-image for these small-scale but significant patterns, the question arises: how do the two main clades of deer differ in the incidence of auricular semets?
The two main subfamilies are Cervinae and Odocoileinae, the former associated mainly with Eurasia and the latter associated mainly with the Americas (https://en.wikipedia.org/wiki/Capreolinae). The geographical split is blurred by
What I show in this Post is that odocoileine deer in general lack auricular semets, the main exceptions being
In the moose, the pattern differs from that in e.g. the wapiti. This is because it is
Please see the following photos, bearing in mind that an auricular semet is a dark-edged, pale mark near the anterior and/or posterior base of the ear pinna, which seems to accentuate the movements of the ear (e.g. Cervus https://www.shutterstock.com/nb/image-photo/noble-deer-on-reindeer-farm-young-1867754611) for the purposes of social communication.
All these photos show females, excluding winter pelage.
In Odocoileus, auricular semets are faintly present in at least some individuals/species/subspecies. This includes the posterior position.
Odocoileus virginianus:
https://www.123rf.com/photo_10727638_close-up-image-of-a-white-tailed-deer-looking-directly-at-the-viewer-.html?vti=me7lbltklur83dgwan-1-28 and https://www.agefotostock.com/age/en/details-photo/white-tailed-deer-odocoileus-virginianus-ears-facing-to-rear/AAM-AAES75032 and https://www.alamy.com/closeup-portrait-of-a-whitetail-deer-face-looking-directly-at-the-camera-image240876206.html and https://www.deviantart.com/chuckrondeau/art/sweet-doe-face-215130437 and https://www.istockphoto.com/photo/feeding-whitetail-gm604347212-103768165 and https://www.istockphoto.com/photo/whitetail-deer-portrait-gm599957346-103073445 and https://www.istockphoto.com/photo/close-up-head-shot-of-doe-deer-gm1181687771-331531385 and https://www.canstockphoto.com/doe-profile-4843035.html
posterior position in O. virginianus:
https://www.alamy.com/rear-view-of-whitetail-deer-image276544713.html and http://www.huntingseasonready.com/whitetail-deer-hunting-tips/ and https://www.waaytv.com/content/news/New-law-allows-hunters-to-use-bait-to-hunt-white-tailed-deer-feral-pigs-509882281.html and https://www.dreamstime.com/deer-white-tailed-deer-animal-photo-deer-white-tailed-deer-animal-close-up-profile-view-deer-white-tailed-deer-animal-close-up-image165589990
Odocoileus hemionus hemionus:
https://www.istockphoto.com/photo/sweet-doe-eyes-gm94977058-3425761 and https://www.agefotostock.com/age/en/details-photo/odocoileus-hemionus-mule-deer-doe-female-alberta-canada-rocky-mountains/ACX-acp98340 and https://www.bigstockphoto.com/image-352098998/stock-photo-a-deer-in-the-grass%2C-licking-its-nose-with-a-long-pink-tongue%2C-big-brown-eyes%2C-shades-of-brown-fur%2C
posterior position in O. h. hemionus:
https://www.shutterstock.com/nb/video/clip-19415659-mule-deer-female-doe-adult-lone-eating
Odocoileus hemionus sitkensis:
https://www.projectnoah.org/spottings/9926088/fullscreen and https://www.flickr.com/photos/131551548@N03/22634897871/
Odocoileus hemionus californicus:
https://www.istockphoto.com/photo/mule-deer-gm811401016-131285265
posterior position in O. h. californicus:
https://www.istockphoto.com/photo/back-view-of-young-black-tailed-deer-head-yosemite-national-park-california-gm1164430579-320072937 and https://www.istockphoto.com/photo/black-tailed-deer-gm1069758032-286169994
Odocoileus hemionus columbianus:
https://www.istockphoto.com/photo/blacktail-doe-looking-at-the-camera-gm155141114-18380026 and https://www.istockphoto.com/photo/black-tailed-deer-pooping-gm1272898131-375034523
posterior position in O. h. columbianus:
https://www.canstockphoto.com/black-tailed-deer-on-wa-coast-1-20725189.html
However, auricular semets are absent in Rangifer, Capreolus, Blastocerus (except for a faint version in the posterior position), Ozotoceros, Hippocamelus, Pudu, and Mazama, as follows.
Rangifer tarandus:
https://www.alamy.com/stock-image-reindeer-pulling-a-funny-face-for-the-camera-163447232.html
Capreolus capreolus:
https://keyassets.timeincuk.net/inspirewp/live/wp-content/uploads/sites/6/2014/08/roe-deer.jpg and https://www.canstockphoto.com/close-up-of-a-roe-deer-fawn-15676304.html and https://www.masterfile.com/image/en/700-08916178/closeup-portrait-of-head-of-roe-deer-capreolus-capreolus-feeding and https://www.imageselect.eu/fr/stock-photo/Roe-deer.html and https://www.imageselect.eu/fr/stock-photo/even_17.html and https://www.dreamstime.com/stock-photo-young-european-roe-deer-capreolus-capreolus-sitting-grass-image45016998
Blastocerus dichotomus:
https://www.robertharding.com/preview/483-1805/rare-pampas-deer-grazing-swamp-ibera-national-park/ and https://www.robertharding.com/preview/1112-3594/adult-female-marsh-deer-blastocerus-dichotomus-pousado-alegre/ and https://www.shutterstock.com/nb/video/clip-1070660170-slow-motion-marsh-deer-chewing-grass-while (which, incidentally, nicely shows the buccal semet in this species) and https://www.shutterstock.com/nb/video/clip-1070793064-close-shot-marsh-deer-falling-asleep-while
posterior position in B. dichotomus:
https://www.dreamstime.com/female-marsh-deer-blastocerus-dichotomus-watching-aside-ae-image106237251
Ozotoceros bezoarticus:
see photos in http://www.proyectoibera.org/download/venado/informe_proyecto_venados_corrientes_2013.pdf
Hippocamelus bisulcus:
https://www.flickr.com/photos/frosselot/4439232371 and https://news.mongabay.com/2020/02/unsung-species-one-of-earths-rarest-land-mammals-clings-to-a-hopeful-future-commentary/ and https://www.youtube.com/watch?v=kvqnIAw63XQ and see photos in https://static1.squarespace.com/static/595ca91bebbd1a1d0aaab285/t/5a53fdf3ec212d2daa1934ee/1515453978197/Wildlife_Bulletin_01.pdf
Pudu puda:
https://kidadl.com/animal-facts/pudu-facts and https://kmstravel.cl/2016/06/15/have-you-ever-heard-about-pudus-this-lovely-animals-are-in-chile/
Mazama gouazoubira:
http://animal.memozee.com/ArchOLD-7/1195371911.jpg
Finally, the following again show that an auricular semet occurs in adult females of Alces alces
Alces alces:
https://www.gettyimages.com.au/detail/news-photo/maine-near-greenville-moose-cow-portrait-news-photo/452997246?adppopup=true and https://dissolve.com/stock-photo/Close-moose-cow-eating-Denali-Alaska-United-States-royalty-free-image/101-D869-14-463 and https://www.pikist.com/free-photo-vzfnv and https://www.gettyimages.co.uk/detail/photo/cow-moose-in-fall-alces-alces-female-animal-close-royalty-free-image/1187507632 and https://www.flickr.com/photos/11304433@N00/1155459554 and http://www.jkcassady.com/gallery/moose2.htm and https://www.gettyimages.com.au/detail/photo/cow-moose-in-fall-alces-alces-female-animal-close-royalty-free-image/1187507632?adppopup=true and https://www.gettyimages.com.au/detail/photo/side-view-of-moose-in-forest-royalty-free-image/728881881?adppopup=true
To be continued in https://www.inaturalist.org/journal/milewski/55666-auricular-semets-in-cervus-rusa-and-axis-but-not-other-cervine-deer#...
Comentarios
https://focusedcollection.com/stock-photos/deer-head.html?iv=461917470
The following shows both an auricular semet and a buccal semet in Odocoileus virginianus: https://www.dreamstime.com/royalty-free-stock-images-female-deer-image10959319.
Odocoileus virginianus shows a clear posterior auricular semet in the winter coat: https://www.dreamstime.com/white-tailed-deer-odocoileus-virginianus-closeup-portrait-young-doe-snow-winter-minnesota-image145125889 and https://www.dreamstime.com/white-tailed-deer-odocoileus-virginianus-closeup-portrait-young-doe-white-tailed-deer-odocoileus-virginianus-closeup-portrait-image145154136.
Ditto for Odocoileus hemionus hemionus: https://www.dreamstime.com/royalty-free-stock-photography-ears-forward-image12308737.
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