I get a lot of “https://www.bing.com/” referrers under Referrer Websites.
I think it’s not appearing under search engines because of the httpS protocol in the URL.
Can you move those under Search Engines please?
Maybe the best solution would be to treat http & https the same for all search engines in an uniform manner, to prevent similar problems in the future. I’m sure that all misc search engines will start to offer HTTPS one by one, and Piwik will put them under Websites. 
Thanks for letting us know, created a bug report @ Bing, Yahoo, etc. may be shown as "Websites" instead of "Search engines" · Issue #9438 · matomo-org/piwik · GitHub
Hi,
Are there any news on this?
Still getting lots of search engine marked as simple websites.
HTTPS referrer search engines:
https://search.bt.com/result?channel=btfon&p=example+query
https://www.google.ru/search
https://www.google.co.id/search
https://cse.google.com/cse?hl=tr&cx=partner-pub-7724398453132474:uo00y3f33s4&q=example+query&sa=Google'da+Ara&ie=utf-8
https://cse.google.com/cse?cx=010720650476917319035:grbfmxha2ng&sa=Search&cof=FORID:0&ie=utf-8&oe=utf-8&q=example+query
http://cse.google.com/cse?cx=016950229825784542350:bzwdloke61c&q=examplequery&oq=examplequery&gs_l=partner.12...19296.25489.0.27512.8.8.0.0.0.0.476.2449.1j0j2j4j1.8.0.gsnos,n=13...0.6279j7232129j8..1ac.1.25.partner..7.1.374.nF4pSwcnzCk
https://search.disconnect.me/searchTerms/serp?search=d7c00246-73e3-438d-b933-560bcfe91110
https://us.search.yahoo.com/
https://ca.search.yahoo.com/
https://au.search.yahoo.com/
https://malaysia.search.yahoo.com/
https://safesearch.avira.com/
https://search.avast.com/AV772/search/web?qsi=21&q=example%query&fcoid=4&fcop=results-bottom&fpid=2
https://startpage.com/do/search
And some-non HTTPS while at it 
http://startgoogle.startpagina.nl/?start=20&query=example+query&num=10&ts=ts2&origin=homepage&tab=internet
http://govome.inspsearch.com/search/web?qsi=11&q=example%20query&p=2&fcoid=4&fcop=bottomnav&fpid=2
http://jwsearch.jword.jp/search?q=examplequery&act=web&pvs=e-start-search-box&inec=utf-8&per_page=2
http://search.lookseek.com/search2.php?q=example%20query&start=41
http://msxml.excite.com/search/web?qsi=61&q=example%20query&p=7&fcoid=4&fcop=bottomnav&fpid=2
http://startab.me/search/?q=example%20query
http://www.only-search.com/?s=web&babsrc=HP_tedge&affID=130425&rlz=0&sd=61&q=example+query&start=90
And a new special one that just started appearing:
android-app://com.google.android.googlequicksearchbox
hi there,
Are you using Piwik 2.16.1?
If so please report these entries in the issue tracker for our project where we maintain the list of search engines and social network, here: Issues · matomo-org/searchengine-and-social-list · GitHub
You are also welcome to make contributions to the project and suggest new search engines, see: GitHub - matomo-org/searchengine-and-social-list: List of Search engines URLs, keywords and Social network URLs definitions used by Piwik Analytics