I needed to replace the white background with a transparent one, so I opened the original png in inkscape and traced the bitmap, changing it into a vector image.
Then I simply deleted the path that made up the white background, and exported the png.
Here’s the result. An inkscape traced version of icantthinkofaname-09’s Intrepid Ibex stuffed animal with a transparent background:
Intrepid Ibex Stuffed Animal is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.
Based on a work at http://icantthinkofaname-09.deviantart.com/art/Intrepid-Ibex-Stuffed-Animal-140757059.