It's much easier to type "searchterm" or "searchterm wiki" in your web browser address bar and then click through to the Wikipedia result than it is to first navigate to every individual site and use their non-standard search bar.
So `w fish` will produce `https://en.wikipedia.org/w/index.php?search=fish&title=Speci...` which auto-forwards to https://en.wikipedia.org/wiki/Fish
*better = more predictable in my case