You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <allimages aicontinue="Biodiversity.jpg" />
  </query-continue>
  <query>
    <allimages>
      <img name="B001.jpg" timestamp="2010-09-19T03:45:12Z" url="https://www.unwelcomeguests.net/images/1/19/B001.jpg" descriptionurl="https://www.unwelcomeguests.net/File:B001.jpg" ns="6" title="File:B001.jpg" />
      <img name="BBC_Dr_Rola_Video_Fakery.jpg" timestamp="2013-11-02T08:01:22Z" url="https://www.unwelcomeguests.net/images/4/47/BBC_Dr_Rola_Video_Fakery.jpg" descriptionurl="https://www.unwelcomeguests.net/File:BBC_Dr_Rola_Video_Fakery.jpg" ns="6" title="File:BBC Dr Rola Video Fakery.jpg" />
      <img name="BIS.png" timestamp="2013-11-29T15:08:04Z" url="https://www.unwelcomeguests.net/images/e/ec/BIS.png" descriptionurl="https://www.unwelcomeguests.net/File:BIS.png" ns="6" title="File:BIS.png" />
      <img name="Bailouts.jpg" timestamp="2012-07-04T16:32:11Z" url="https://www.unwelcomeguests.net/images/d/d6/Bailouts.jpg" descriptionurl="https://www.unwelcomeguests.net/File:Bailouts.jpg" ns="6" title="File:Bailouts.jpg" />
      <img name="Bank_Rescue_Plan-cut.jpg" timestamp="2010-06-26T12:26:31Z" url="https://www.unwelcomeguests.net/images/e/e3/Bank_Rescue_Plan-cut.jpg" descriptionurl="https://www.unwelcomeguests.net/File:Bank_Rescue_Plan-cut.jpg" ns="6" title="File:Bank Rescue Plan-cut.jpg" />
      <img name="Bank_Rescue_Plan.jpg" timestamp="2010-06-26T10:25:51Z" url="https://www.unwelcomeguests.net/images/4/43/Bank_Rescue_Plan.jpg" descriptionurl="https://www.unwelcomeguests.net/File:Bank_Rescue_Plan.jpg" ns="6" title="File:Bank Rescue Plan.jpg" />
      <img name="Ben_Manski.jpg" timestamp="2010-10-09T04:02:55Z" url="https://www.unwelcomeguests.net/images/f/ff/Ben_Manski.jpg" descriptionurl="https://www.unwelcomeguests.net/File:Ben_Manski.jpg" ns="6" title="File:Ben Manski.jpg" />
      <img name="Bernie_Sanders.jpg" timestamp="2011-03-09T15:10:31Z" url="https://www.unwelcomeguests.net/images/d/de/Bernie_Sanders.jpg" descriptionurl="https://www.unwelcomeguests.net/File:Bernie_Sanders.jpg" ns="6" title="File:Bernie Sanders.jpg" />
      <img name="Beyond_the_promised_land_cover.jpg" timestamp="2010-09-29T05:36:42Z" url="https://www.unwelcomeguests.net/images/b/b8/Beyond_the_promised_land_cover.jpg" descriptionurl="https://www.unwelcomeguests.net/File:Beyond_the_promised_land_cover.jpg" ns="6" title="File:Beyond the promised land cover.jpg" />
      <img name="Bill_Hicks.jpg" timestamp="2010-09-16T15:57:46Z" url="https://www.unwelcomeguests.net/images/a/a4/Bill_Hicks.jpg" descriptionurl="https://www.unwelcomeguests.net/File:Bill_Hicks.jpg" ns="6" title="File:Bill Hicks.jpg" />
    </allimages>
  </query>
</api>