In reply to Emily Barney.

Hi Emily, I was using a Flickr plugin for WordPress (previously Zemanta) that sourced the images from a search in your WP dashboard, and then you could drop the image in (so it was hosted elsewhere).

What I like about the Pixabay option is I can support the artist directly - use their work, and make a PayPal donation if/where applicable. I also find the quality better, as in more choice and not limited to stock-type photographs, which I often find is the case with CC.

But that could just be me. :)