@beartracker @oviscanadensis_connerties @tandala @tonyrebelo @ludwig_muller @jeremygilmore @paradoxornithidae @capracornelius @chewitt97 @biohexx1 @jwidness @saber_animal @jamesjarrett00 @aguilita @matthewinabinett @graysquirrel
...continued from https://www.inaturalist.org/journal/milewski/70081-adaptive-colouration-of-northwestern-oribi-ourebia-montana-quadriscopa-part-1#
BUCCAL SEMET
Buccal semets are any markings that serve to accentuate the chewing movements of the Jaws, particularly in ruminants.
Like flags, semets are activated by motion. However, semets tend to be smaller-scale than flags, and are so subtle that they have been overlooked by naturalists and zoologists until now.
Various ruminants possess a subtle pattern of dark/pale contrast at the junction of the 'chin' and the rest of the lower jaw. I hypothesise that this aids social monitoring within the species, particularly during rumination.
When bovids or cervids rest in small groups, vigilance depends on hearing as much as eyesight.
Cud-chewing would tend to interfere with hearing, because of the 'white noise' of grinding by the teeth.
When any individual detects cause for suspicion, it stops chewing, in order to listen up. This is potentially signalled to other members of the group by the interruption of the motion of the lower jaw.
Any distinctive pattern on the lower jaw, although conspicuous only at close range, can potentially aid this collective vigilance by emphasising the chewing movements, and thus also their sudden cessation.
The following illustrate typical situations in which a buccal semet would function, in Ourebia:
https://www.inaturalist.org/observations/17121843 and https://www.inaturalist.org/observations/39848905 and https://www.inaturalist.org/observations/39220728.
To acquire a search-image for a buccal semet in Ourebia montana, let us first examine one species of cervid, and two other spp. of bovids.
Also see https://www.inaturalist.org/journal/milewski/55532-previously-overlooked-facial-expressions-in-the-wapiti#.
Rusa unicolor:
https://twitter.com/D_Supriya/status/1270262947986767872
https://stock.adobe.com/search?k=%22rusa+unicolor%22&asset_id=170943770
https://es.123rf.com/photo_21215015_closeup-face-of-deer-muntiacus-feai-side-profile-in-the-jungle-environment.html
Taurotragus oryx:
https://stock.adobe.com/au/search?filters%5Bcontent_type%3Aphoto%5D=1&filters%5Bcontent_type%3Aillustration%5D=1&filters%5Bcontent_type%3Azip_vector%5D=1&filters%5Bcontent_type%3Avideo%5D=1&filters%5Bcontent_type%3Atemplate%5D=1&filters%5Bcontent_type%3A3d%5D=1&filters%5Bcontent_type%3Aaudio%5D=0&filters%5Binclude_stock_enterprise%5D=0&filters%5Bis_editorial%5D=0&filters%5Bfree_collection%5D=0&filters%5Bcontent_type%3Aimage%5D=1&k=male+eland&order=relevance&safe_search=1&limit=100&search_page=7&search_type=pagination&get_facets=0&asset_id=196960936
https://stock.adobe.com/au/search?filters%5Bcontent_type%3Aphoto%5D=1&filters%5Bcontent_type%3Aillustration%5D=1&filters%5Bcontent_type%3Azip_vector%5D=1&filters%5Bcontent_type%3Avideo%5D=1&filters%5Bcontent_type%3Atemplate%5D=1&filters%5Bcontent_type%3A3d%5D=1&filters%5Bcontent_type%3Aaudio%5D=0&filters%5Binclude_stock_enterprise%5D=0&filters%5Bis_editorial%5D=0&filters%5Bfree_collection%5D=0&filters%5Bcontent_type%3Aimage%5D=1&k=male+eland&order=relevance&safe_search=1&limit=100&search_page=2&get_facets=0&search_type=pagination&asset_id=300232095
https://stock.adobe.com/au/search?as_audience=srp&as_campaign=Freepik&get_facets=1&order=relevance&safe_search=1&search_page=0&as_content=api&k=male+eland&as_camptype=test-density-b&tduid=86f6bb255d68643c6d65a89810a8b212&as_channel=affiliate&as_campclass=redirect&as_source=arvato&asset_id=464125923
https://stock.adobe.com/au/search?filters%5Bcontent_type%3Aphoto%5D=1&filters%5Bcontent_type%3Aillustration%5D=1&filters%5Bcontent_type%3Azip_vector%5D=1&filters%5Bcontent_type%3Avideo%5D=1&filters%5Bcontent_type%3Atemplate%5D=1&filters%5Bcontent_type%3A3d%5D=1&filters%5Bcontent_type%3Aaudio%5D=0&filters%5Binclude_stock_enterprise%5D=0&filters%5Bis_editorial%5D=0&filters%5Bfree_collection%5D=0&filters%5Bcontent_type%3Aimage%5D=1&k=male+eland&order=relevance&safe_search=1&limit=100&search_page=2&get_facets=0&search_type=pagination&asset_id=384537149
https://stock.adobe.com/au/search?as_audience=srp&as_campaign=Freepik&get_facets=1&order=relevance&safe_search=1&search_page=0&as_content=api&k=male+eland&as_camptype=test-density-b&tduid=86f6bb255d68643c6d65a89810a8b212&as_channel=affiliate&as_campclass=redirect&as_source=arvato&asset_id=294140010
https://www.freepik.com/premium-photo/large-male-eland-antelope_5818988.htm#query=male%20eland&position=40&from_view=keyword
https://www.freepik.com/premium-photo/large-male-eland-antelope_5818980.htm#query=male%20eland&position=38&from_view=keyword
https://stock.adobe.com/au/search?as_audience=srp&as_campaign=Freepik&get_facets=1&order=relevance&safe_search=1&search_page=0&as_content=api&k=male+eland&as_camptype=test-density-b&tduid=86f6bb255d68643c6d65a89810a8b212&as_channel=affiliate&as_campclass=redirect&as_source=arvato&asset_id=294139960
https://stock.adobe.com/au/search?filters%5Bcontent_type%3Aphoto%5D=1&filters%5Bcontent_type%3Aillustration%5D=1&filters%5Bcontent_type%3Azip_vector%5D=1&filters%5Bcontent_type%3Avideo%5D=1&filters%5Bcontent_type%3Atemplate%5D=1&filters%5Bcontent_type%3A3d%5D=1&filters%5Bcontent_type%3Aaudio%5D=0&filters%5Binclude_stock_enterprise%5D=0&filters%5Bis_editorial%5D=0&filters%5Bfree_collection%5D=0&filters%5Bcontent_type%3Aimage%5D=1&k=male+eland&order=relevance&safe_search=1&limit=100&search_page=3&search_type=pagination&get_facets=0&asset_id=46484692
https://stock.adobe.com/au/search?filters%5Bcontent_type%3Aphoto%5D=1&filters%5Bcontent_type%3Aillustration%5D=1&filters%5Bcontent_type%3Azip_vector%5D=1&filters%5Bcontent_type%3Avideo%5D=1&filters%5Bcontent_type%3Atemplate%5D=1&filters%5Bcontent_type%3A3d%5D=1&filters%5Bcontent_type%3Aaudio%5D=0&filters%5Binclude_stock_enterprise%5D=0&filters%5Bis_editorial%5D=0&filters%5Bfree_collection%5D=0&filters%5Bcontent_type%3Aimage%5D=1&k=male+eland&order=relevance&safe_search=1&limit=100&search_page=4&search_type=pagination&get_facets=0&asset_id=402656831
https://www.dreamstime.com/large-male-eland-antelope-large-male-eland-antelope-tragelaphus-oryx-natural-habitat-image160358444
https://www.dreamstime.com/large-male-eland-antelope-large-male-eland-antelope-tragelaphus-oryx-natural-habitat-image160358548
https://www.dreamstime.com/eland-antelope-solitario-comiendo-taurotragus-oryx-one-largest-antelopes-animals-very-difficult-to-approach-image161904009
Aepyceros melampus:
https://www.dreamstime.com/close-up-profile-portrait-impala-horns-grazing-field-image254412051
https://www.dreamstime.com/stock-photo-impala-ram-profile-image19333840
https://www.dreamstime.com/stock-photo-side-profile-male-black-faced-impala-etosha-national-park-namibia-image90694760
https://www.dreamstime.com/stock-images-male-impala-antelope-fighting-tarangire-national-park-image37475334
https://www.dreamstime.com/impala-aepyceros-melampus-males-fighting-masai-mara-park-kenya-image196305617
https://www.dreamstime.com/impala-aepyceros-melampus-males-fighting-masai-mara-park-kenya-image198642974
https://www.dreamstime.com/royalty-free-stock-images-portrait-impala-image3779909
https://www.dreamstime.com/impala-antelope-close-up-portrait-female-head-moremi-game-reserve-botswana-image157882201
Ourebia montana quadriscopa:
https://www.inaturalist.org/observations/8490559
https://www.inaturalist.org/observations/67005610 (compare this with https://stock.adobe.com/search?k=%22rusa+unicolor%22&asset_id=170943770)
Ourebia montana cottoni/masakensis:
https://www.inaturalist.org/observations/104527551
https://www.inaturalist.org/observations/100799069
Discussion:
There is a pattern, in Ourebia montana, that is shared with ruminants as diverse as Rusa, Taurotragus, and Aepyceros.
However, in O. montana the pattern is so faint, to the human eye, that nobody would have noticed it, but for a search image,
I suspect that there is an ultraviolet component to the pattern in Ourebia, which the human eye can hardly detect.
Posted on
Σεπτέμβριος 19, 2022 0552 ΠΜ
by
milewski
Σχόλια
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https://www.dreamstime.com/herd-big-antelopes-lake-mburo-np-uganda-africa-eland-anthelope-taurotragus-oryx-brown-african-mammal-nature-habitat-green-image254545019
https://stock.adobe.com/au/search?as_audience=srp&as_campaign=Freepik&get_facets=1&order=relevance&safe_search=1&search_page=0&as_content=api&k=male+eland&as_camptype=test-density-b&tduid=86f6bb255d68643c6d65a89810a8b212&as_channel=affiliate&as_campclass=redirect&as_source=arvato&asset_id=370661616
https://stock.adobe.com/au/search?as_audience=srp&as_campaign=Freepik&get_facets=1&order=relevance&safe_search=1&search_page=0&as_content=api&k=male+eland&as_camptype=test-density-b&tduid=86f6bb255d68643c6d65a89810a8b212&as_channel=affiliate&as_campclass=redirect&as_source=arvato&asset_id=130115940
https://stock.adobe.com/au/search?as_audience=srp&as_campaign=Freepik&get_facets=1&order=relevance&safe_search=1&search_page=0&as_content=api&k=male+eland&as_camptype=test-density-b&tduid=86f6bb255d68643c6d65a89810a8b212&as_channel=affiliate&as_campclass=redirect&as_source=arvato&asset_id=450856370
https://stock.adobe.com/au/search?filters%5Bcontent_type%3Aphoto%5D=1&filters%5Bcontent_type%3Aillustration%5D=1&filters%5Bcontent_type%3Azip_vector%5D=1&filters%5Bcontent_type%3Avideo%5D=1&filters%5Bcontent_type%3Atemplate%5D=1&filters%5Bcontent_type%3A3d%5D=1&filters%5Bcontent_type%3Aaudio%5D=0&filters%5Binclude_stock_enterprise%5D=0&filters%5Bis_editorial%5D=0&filters%5Bfree_collection%5D=0&filters%5Bcontent_type%3Aimage%5D=1&k=male+eland&order=relevance&safe_search=1&limit=100&search_page=2&get_facets=0&search_type=pagination&asset_id=325442876
https://stock.adobe.com/au/search?filters%5Bcontent_type%3Aphoto%5D=1&filters%5Bcontent_type%3Aillustration%5D=1&filters%5Bcontent_type%3Azip_vector%5D=1&filters%5Bcontent_type%3Avideo%5D=1&filters%5Bcontent_type%3Atemplate%5D=1&filters%5Bcontent_type%3A3d%5D=1&filters%5Bcontent_type%3Aaudio%5D=0&filters%5Binclude_stock_enterprise%5D=0&filters%5Bis_editorial%5D=0&filters%5Bfree_collection%5D=0&filters%5Bcontent_type%3Aimage%5D=1&k=male+eland&order=relevance&safe_search=1&limit=100&search_page=2&get_facets=0&search_type=pagination&asset_id=322249275
https://stock.adobe.com/au/search?filters%5Bcontent_type%3Aphoto%5D=1&filters%5Bcontent_type%3Aillustration%5D=1&filters%5Bcontent_type%3Azip_vector%5D=1&filters%5Bcontent_type%3Avideo%5D=1&filters%5Bcontent_type%3Atemplate%5D=1&filters%5Bcontent_type%3A3d%5D=1&filters%5Bcontent_type%3Aaudio%5D=0&filters%5Binclude_stock_enterprise%5D=0&filters%5Bis_editorial%5D=0&filters%5Bfree_collection%5D=0&filters%5Bcontent_type%3Aimage%5D=1&k=male+eland&order=relevance&safe_search=1&limit=100&search_page=2&get_facets=0&search_type=pagination&asset_id=463534213
https://stock.adobe.com/au/search?filters%5Bcontent_type%3Aphoto%5D=1&filters%5Bcontent_type%3Aillustration%5D=1&filters%5Bcontent_type%3Azip_vector%5D=1&filters%5Bcontent_type%3Avideo%5D=1&filters%5Bcontent_type%3Atemplate%5D=1&filters%5Bcontent_type%3A3d%5D=1&filters%5Bcontent_type%3Aaudio%5D=0&filters%5Binclude_stock_enterprise%5D=0&filters%5Bis_editorial%5D=0&filters%5Bfree_collection%5D=0&filters%5Bcontent_type%3Aimage%5D=1&k=male+eland&order=relevance&safe_search=1&limit=100&search_page=2&get_facets=0&search_type=pagination&asset_id=93457495
https://stock.adobe.com/au/search?filters%5Bcontent_type%3Aphoto%5D=1&filters%5Bcontent_type%3Aillustration%5D=1&filters%5Bcontent_type%3Azip_vector%5D=1&filters%5Bcontent_type%3Avideo%5D=1&filters%5Bcontent_type%3Atemplate%5D=1&filters%5Bcontent_type%3A3d%5D=1&filters%5Bcontent_type%3Aaudio%5D=0&filters%5Binclude_stock_enterprise%5D=0&filters%5Bis_editorial%5D=0&filters%5Bfree_collection%5D=0&filters%5Bcontent_type%3Aimage%5D=1&k=male+eland&order=relevance&safe_search=1&limit=100&search_page=3&search_type=pagination&get_facets=0&asset_id=359997487
https://stock.adobe.com/au/search?filters%5Bcontent_type%3Aphoto%5D=1&filters%5Bcontent_type%3Aillustration%5D=1&filters%5Bcontent_type%3Azip_vector%5D=1&filters%5Bcontent_type%3Avideo%5D=1&filters%5Bcontent_type%3Atemplate%5D=1&filters%5Bcontent_type%3A3d%5D=1&filters%5Bcontent_type%3Aaudio%5D=0&filters%5Binclude_stock_enterprise%5D=0&filters%5Bis_editorial%5D=0&filters%5Bfree_collection%5D=0&filters%5Bcontent_type%3Aimage%5D=1&k=male+eland&order=relevance&safe_search=1&limit=100&search_page=11&search_type=pagination&get_facets=0&asset_id=145363946
https://www.dreamstime.com/stock-photo-profile-impala-aepyceros-melampus-walking-dry-grass-samburu-national-reserve-kenya-east-africa-image79675225
https://www.dreamstime.com/stock-photo-herd-female-impala-image60578819
https://www.dreamstime.com/stock-image-impala-wild-gazelle-topi-antelope-tanzania-national-parks-image33506161
https://www.dreamstime.com/royalty-free-stock-photography-impala-wild-gazelle-topi-antelope-tanzania-national-parks-image33531177
https://www.dreamstime.com/royalty-free-stock-images-impala-wild-gazelle-topi-antelope-tanzania-national-parks-image33530619
https://www.dreamstime.com/royalty-free-stock-photos-impala-wild-gazelle-topi-antelope-tanzania-national-parks-image33530648
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