Last week, Bing reported that they were Testing Bing search results on Yahoo! Today, Yahoo! finalized transition to Bing. When searching with Yahoo! in the United States and Canada (English) you will see a “powered by Bing” at the bottom of the search results and will appear on all web, image and video searches on both desktop and mobile devices.
That was announced in a new blog post from Yahoo Search blog with title “Yahoo! Transitions Organic Search Back-End to Microsoft Platform” by Shashi Seth, Senior Vice President of Yahoo! Search Products. Also Bing announced that it is powering Yahoo!’s search results in the US and Canada (English only for now, the other languages will come in the weeks and months ahead)